Some questions in English

I am preparing for an English exam. But I am not quite sure about the answers to the following questions. Could anyone help me check the answers to these questions to see if they are right? Thank you very much.

1.The symbolism of wedding gifts has changed. In the past, gifts helped__B a couple's home.Now it's important that a wedding gift be something a couple can enjoy.
A.set out B.set up C.set on D.set down

2._D_ purposes of illustration, this chapter first uses the dictomomp as a sample technique. It is a variation __ the traditinal dictation procedure.
A.With ...on B.On...of C.To... of D.For...on

3.Everyone in Beijing has been caught on the street __B_ the toilet and turned to McDonald's. But in Helsinki, every McDonald's toilet is locked-until you insert a euro.
A.needs B.needing C.for needing D.to need

4.The minute they failed him---even by_D__refusing a dinner invitation, he cast them off withiout a second thought.
A.so much as B.son many as C.so much as to D.so far as

5.It is not cheap but I think we should buy it __D_
A.furthermore B.otherwise C.or else D.nonetheless

6.Though man has landed on the moon, yet we still know little about the (configuration) of it.Here configuration means_A_
A.structure B.core C.figure D.arrangement

7.I've been too preoccupied_B_ my work to even think about taking a holiday.
A.by B.with C.of D.for

8.It;s a particularly favorable day for those who have either been unwell or _D__ recently.
A.in some sort B.after a sort C. in any sort D.out of sorts
9.He was confident that as far as contributions were concerned his friend would be _B__another thousand dollars.
A.good at B.good with C.good to D.good for

10.In cross cultural interaction, speakers sometimes assume that what they believe is right,because they have grown up__A_ their way is the best.
A.to think B.bhinking C.to thinking D.think

11.While development gathers (momentum)we shall have to tolerate a variety of deviations from the principles which we support. Here momentum means___
A.impetus B.pulse C.pace D.energy

12.The dollar fell sharply today _C_ growing speculation that the President is about to declare war.
A.in amidst B.in midst C.amidst D.midst