Chọn đáp án đúng và giải thích

giúp em với ạ và giải thích nữa ạ 
(em đang cần gấp)
1. He invented a new kind of wheelchair for the _______.   A. unemployed            B. poor               C. disabled   D. unhappy
2. How often ______ your car serviced since you bought it?                                                                              
A. do you get                    B. did you get                C. had you gotten           D. have you gotten
3. _______ you work harder, you are going to pass your exams. A. If    B. Unless  C. Although     D. Because of
4. The plane from Dallas _______two hours late, so I missed my connect­ing flight from Frankfurt to London.
     A. took on                      B. took in                         C. took over                   D. took off
5. A _______is a film with factual information, often about a problem in society.
A. series                    B. soap opera               C. documentary               D. drama
6. ______ the storm warnings, we did not go out last night. A. Since     B. In spite of   C. Because of  D. The result
7. Fax machine ______ send or receive letters quickly.        A. is used for   B. used to        C. is used to    D. used for
8. In large classes, children feel that they cannot ______ with the teacher.  A. contact  B. interact C. transmit  D. relax
9. Students for ____ English is a second language should consider taking the course.
A. who             B. whom                      C. that             D. whose
10. Many peasants find it difficult to make ends meet.         
A. get plenty of food     B. better their life     C. earn enough money for living   D. apply new farming methods.
11. This door should only be used in an emergency.
     A. a serious problem     B. an annoying situation         C. a serious situation           D. a happy event
12. Television can make things ________ because it presents information in an effective way.
       A. memory                  B. memorial                 C. memorable            D. memorably
13. When I arrived the theater, the play ____. I missed the first part.
A. had started                   B. started                       C. was starting           D. has started
14. Will you________ after the party?                        A. call me off  B. get me on   C. take me up     D. pick me up
15. Most of the roads in the city have been ____ recently. A. replaced B. resurfaced        C. removed     D. returned
16. My uncle is a _____. He often does research in his laboratory.
A. science                   B. scientifically                        C. scientist                        D. scientific
17. You are not allowed to camp here without ___. A. permission    B. persuasion  C. protection   D. decision
18. Many vegetables and flowers are grown in greenhouses in late win­ter and early spring, then ___ outside as the weather warms.                      A. transplanted            B. harrowed                C. ploughed                 D. prepared
19. This tractor is no longer ___ and worth keeping. We should throw it away and buy a new one
A. proper                     B. helpless                   C. running                   D. useful 
20. I wanted to work somewhere where I could serve the ______ A. village            B. community C. town  D. country 
21. Many people oppose corporal, punishment when educating young children although several of them are naughty.
A. agree with               B. disapprove of                      C. are in favor of                     D. appreciate