a. Yes, I do.

b. Yes, I have.

c. Yes, I did.

d. Yes, I told.

a. reason

b. start

c. result

d. cause

a. Auxiliary verb

b. Modal verb

c. Main verb

a. in

b. on

c. to

a. speak

b. to speak

a. True

b. False

a. did it take

b. it took

c. took it

a. turning

b. to turn

a. forecast

b. prediction

a. The speaker wants to know if the person is in the habit of buying a lot of CDs

b. The speaker is probably in a record shop and wants to know how many CDs the other person has got in their bag