Let me know if my answers are correct or wrong ?

Dear Clive / Mister / Experts ,

I have already provided the answers in BOLD only need to verify by the experts... thanks in advance

1. He wants to visiting his parents in Washington next week.             A           B             C                   D
(A) wants
(B) to visiting 
(C) his
(D) in
2.  My sister ______ go on vacation to Italy last month, but couldn't.
(A) will  

(B) is going to
(C) should
(D) was going to
3. Robert didn't went to the movie last night because he was tired.                      A         B    C                     D
(A) didn't
(B) went
(C) to
(D) was
4. I enjoy ________ after work at my exercise center. (A)  to swim
(B)  the swimming
(C) swimming 
(D) swim
5. Let's go ________ at the new department store on Saturday.
(A) to shop
(B) the shopping
(C) to shopping 
(D) shopping
6 .He misses  his mother. He wants visiting her  .       A               B     C          D 
(A) his
(B) wants
(C) visiting

(D) her
7. If I ________ enough money last summer, I would have gone to Paris with you.
(A)  had had
(B)  didn't have
(C)  have had
(D)  had    
8. Joseph, you haven't met our CEO before, ________ ?
(A)  do you
(B)  true  

(C)  did you meet
(D)  have you
9. Could you make me a favor on your way A B C home tonight, Mike? D
(A) Could   
(B) make
(C) on your way
(D) home
10. I was used to go to the library every A B day, but now I study at home. C D
(A) was used
(B) every
(C) but
(D) study
11. Although my department always submits its annual report by the end of the year, some______ wait until the end of January.
(A) had has to
(B) has had to
(C) have had to
(D) had to have
12 . The marketing strategy what was used for so long was finally rejected outright by the stockholders.
(A) what

(B) for so long
(C) was
(D) outright
13. We tried to install a natural vent system, but after installation the system failed functioning correctly .
(A) to install
(B) installation
(C) functioning
(D) correctly
14. In deference to Jim's objection regarding the proposal that had been submitted , the committee will have approved the measure had the majority not been swayed by the mayor's opinion.
(A) regarding
(B) submitted
(C) will

(D) been
15. We have stand in line at the movie theater for 30 minutes already .
(A) have stand
(B) in
(C) for
(D) already
16. He insists on to work every day until 7 p.m.
(A) insists on
(B) to work
(C) every day
(D) until 7 p.m
17. The music downstairs was too loud that I couldn't get any sleep last night!   A       B          C   D 
(A) downstairs

(B) too
(C) get
(D) any
18. Who did call me while I was meeting with the sales  representative?  A  B  C D 
(A) did call

(B) while
(C) was meeting
(D) sales
19. I am very interested of trying the new computer software that you bought the other day.  A  B C  D 
(A) of 

(B) trying
(C) that
(D) bought
20. Don't worry. I ______ the work by the time you get back. (A) Will have finished

(B) have finished
(C) will be finished
(D) would have finished

Regards
Hrithik