1.There are five pairs ______,but I'm at a loss which to buy.

1.There are five pairs ______,but I'm at a loss which to buy.
A.to be chosen B.to choose from C.to choose D.for choosing
2.So clearly _____ that even beginners understood what he meant.
A.did he say B.did he speak
3.——Did anyone support you at the meeting?
——Moore was the only person who_____ my opinion.
A.agreed B.cared C.shared D.accepted