1.Do you hear someone ___ at the door? Yes， I did.I heard him ____ three times.

　　A.knock， knock B.knocking， knocking C.knock， knocking D.knocking， knock

　　2.The girl has the ability ___ the huge stone.

　　A.to lift B.of lifting C.lifting D.lifted

　　3. He was a habit ___ in bed.

　　A.to read B.reading C.of reading D.read

　　4. They got up early ___ the train.

　　A.for catching B.in order to catch C.catching D.caught

　　5. They keep the goat ___ so that it will not go away.

　　A.tied up B.trying up C.tie up d.to tie up

　　6. ____ more money， they will work harder.

　　A.Paid B.Being paid C.Paying D.To pay

　　7. Excuse me for ____ passing the examination.

　　A.not my B.my not C.no my D.my no

　　8. ___ handed in exercise-books he was told ___ go home after class.

　　A.Not having， not to B.Having not， not to

　　C.Not having， to not D.Having not， to not

　　9. She is busy now， She ____ a lot of work to do.

　　A.said to have B.said to have had C.is said to have D.is said to have had

　　10.My father expects _______.

　　A.me to be a scientist B.my being a scientist C.me being a scientist D.being a scientist

　　11.What's the best way ____ a foreign language?

　　A.to learn B.of learning C.learning D.both A and B

　　12.He once made an objection _____.

　　A.to elect you B.to being electing you C.to your being elected D.of electing you

　　13.The author stayed here for the purpose ____ an account.

　　A.to write B.to writing C.of writing D.writing

　　14.____ we fail again， what should we do?

　　A.To suppose B.Supposed C.supposing D.Having supposed

　　15.She devoted herself ___ the theory of Marxism.

　　A.to study B.studying C.to studying D.studied

　　16.Don't plant potatoes until I tell you ____.

　　A.that B.to C.to do D.to plant

　　17.The officers are doing what they can ___ their soldiers from _____.

　　A.to prevent， being wounded B.prevent， wounding

　　C.prevent， being wounded D.prevent， wounded

　　18.He ___ his cousin although his parents had told him ____.

　　A.married， not to B.got married， to C.married， to D.got married， not to

　　19.Will you come? ____ .

　　A.I am glad B.I'm coming C.I should be glad to D.I'm glad to be coming

　　20.He asked me to help him repair his radio， but I don't know ____.

　　A.to do it B.how to C.how to do D.what to do it

　　21.___ with fright， a hungry fox hid himself in a small cave， ___ his tail to the rain.

　　A.Trembling， exposing B.Trembled， exposed

　　C.Trembled， exposing D.Trembling， exposed

　　22.Does Mr.Smith remember ___ to China when he was a child?

　　A.being taken B.to be taken C.taking D.to take

　　23.___， water will be turned into vapor.

　　A.Heated B.Heating C.Be heated D.By heating

　　24.He wants ___ as soon as possible.

　　A.that this job is done B.this job done C.this job to do D.this job doing

　　25.Let's stop ___ the composition.

　　A.to write and hand in B.writing and hand in

　　C.writing and to hand in D.writing and handing in

　　26.Do you mean ___ home alone?

　　A.to walk B.walking C.walk D.being walked

　　27.Your hesitation means ____ the chance.

　　A.to give up B.give up C.giving up D.to be given up

　　28.I stepped aside ____.

　　For her passing B.for her to pass C.so that she passed D.for her pass

　　29.Mary had her child ___ to school every day.

　　A.to send B.sent C.send D.sending

　　30.The poor man had his son ____ for years.

　　A.support B.be supported C.supported D.supporting

　　31.____ with a bottle， a ____ candle will soon go out.

　　A.Covering， burning B.Covered， burning C.Covered， burned D.Covering， burned

　　32.The program was so exciting that the children kept their eyes ___ on the TV screen.

　　A.to fix B.fixing C.fixed D.fix

　　33.The long sentence is ____ later.

　　A.to explain B.to have been explained C.to be explained D.to be explaining

　　34.We could not help ____ by her honesty.

　　A.moved B.moving C.being moved D.to be moved

　　35.He suggested ___to Paris for my holidays.

　　A.is going B.me going C.for me going D.that my going

　　36.___ is bad for one's health.

　　A.Smoke B.Smokes C.To smoke D.Smoking

　　37.He told us to start working， but he gave us no tools ____.

　　A.to work with B.to work C.work with D.to work for

　　38.He lifted a rock only ____ on his own foot.

　　A.to drop B.dropping C.for dropping D.drop

　　39.___ there， he wasn't noticed by her.

　　A.Seated B.Seating C.To seat D.Sat

　　40.All passengers ___ to London must changed trains at this stop.

　　A.not going B.aren't going C.don't go D.who not going