Choose the best option

    Làm ĐẦY ĐỦ TĂNG THÊM 20xu ( 1 người )
11. At school, the teacher and students………….. follow the rules.
A. has to                             B. have to                C. need to                D. haven’t to
12.Children need a caring environment to develop………… mentally…………. physically.
A. and- and                        B. both-and             C. the-the                D. in- and
13. ……………... you study harder, you won’t be able to pass the examination.
A. Unless                           B. Because              C. If                         D. without
14.The buses were very …………..…. this morning. We can’t go to the church with you in time.
A. crowd                            B. crowded             C. full                       D. busy
15. He …………. cross the street when the traffic light is green for pedestrians.
A. should                           B. shouldn’t            C. ought                  D. oughtn’t
16. You…………………….…. use your mobile phone on the plane.
A. must                              B. mustn’t               C. don’t have to      D. have to
17.  The farmer rides the buffalo - ……………… carts loaded full of rice home.
 
 A. draw
B.  drawing
C. drew
D. drawn
18. Does she fancy …………… a book to the younger children?
A.  reads                       B. reading                   C. to read                D. read
19. We help load the rice ……………….. carts on the first day of our trip to the countryside.
A. addict                       B. addictive                C. addicted            D. addicting
20.The US is a…………..…..country with over 80 ethnic groups.
A. multi-cultural            B. bi-lingual             C. rich                    D. ethnic
21. So many people nowadays are……computers and mobile phones. They use them a lot.