4. Only in recent years ______ begun to realize that wild dogs, kept within bounds, often do more good than harm。

　　A. people have

　　B. since people have

　　C. have people

　　D. people who have

　　5. _______, we were not going to make any concessions to his unreasonable demands。

　　A. What may come

　　B. come what may

　　C. May what come

　　D. What come

　　6. Not until I shouted at the top of my voice ______ his head。

　　A. that he turned

　　B. did he turn

　　C. he didn't turn

　　D. he had turned

　　7. ______ received law degrees as today。

　　A. Never so women have

　　B. The women aren't ever

　　C. Women who have never

　　D. Never have so many women

　　8. Heat does not travel by convection in solid, because the solid does not move, ______。

　　A. so does a liquid

　　B. so a liquid does

　　C. as does a liquid

　　D. so is a liquid

　　9. On no account ______ to anyone。

　　A. my name must be mentioned

　　B. must my name mention

　　C. must my name be mentioned

　　D. my name must mention