单项选择题

I found ______ hard to concentrate.

A. this
B. that
C. it
D. what
<上一题 目录 下一题>
热门 试题

单项选择题
The scientist Galileo claimed that the earth ______ around the sun.
A. moves
B. moved
C. is moving
D. was moving
单项选择题
None of us expected the president to ______ at the party. We thought he was still in hospital.
A. turn in
B. turn down
C. turn out
D. turn up
相关试题