there is____"f" in the word knife,but it makes ___/f/sound.A,a;an B,an;a C,an;an D,a;a

题目

there is____"f" in the word knife,but it makes ___/f/sound.A,a;an B,an;a C,an;an D,a;a
whose trousers are these?___,I think.
A,they B,their C,theirs D,them
GongQiuyan thought ___ quite ___to learn English well.
A,it's;easy B,it,easily C,it's ;easily D,it,easy

答案

B,an;a
C,theirs
A,it's;easy