【单选题】
20. Only when he had handed in his exam paper ____ he had made several mistakes.
①
he has realized
②
does he realize
③
has he realized
④
did he realize
【单选题】
When he was a boy, he used to go there and watch ____.
①
to repair bicycles
②
bicycles to be repaired
③
bicycles being repaired
④
repairing bicycles
【多选题】
He was on the top of the mountain,and he had ______ breathing.
①
A.problems
②
B..trouble
③
C.question
④
D.puzzle
【单选题】
Had he worked hard, he _____ the exams.
①
must have got through
②
would have got through
③
would get through
④
could get through
【单选题】
—MypencilsharpenerislostandIcantfinditanywhere.—So,youllhavetobuyanew______.
①
it
②
other
③
one
④
any