11. Lan isn’t ............................. to go to school today. A. enough well B. enough good C. well enough D. good enough 12. Boys and girls, you’ll have to do this experiment ............................. this afternoon. A. youself B. yourselves C. yourself D. youselves 13. We must put all the small objects such as beads out ............................. children’s reach. A. of B. in C. on D. to 14. You are too thin. You ............................. eat much more meat. A. ought B. ought not C. ought to D. ought not to 15. I and my pen friend ............................. Ho Chi Minh’s Mausoleum last Sunday. A. visit B. visited C. visits D. visiting 16. Let us ............................. to the school’s library next Monday. A. going B. to go C. to going D. go 17. Peter doesn’t talk much in public. He’s rather ............................. A. kind B. sociable C. humorous D. reserved 18. You must not let children play in the street because it is ............................. A. suitable B. dangerous C. safe D. careful 19. He’ll come ............................. to pick you ............................. A. over / up B. over / on C. in / up D. on / in 20. The sun always ............................. in the East and ............................. in the West. A. rise/ set B. rises/ set C. rises/ sets D. has risen/ set