It is human activity      has caused this global warming.
#85236
A
which
B
that
C
what
D
why
推荐题目
        made her ashamed of herself?the lowest mark in her class.
#84661
A
What;Because she got
B
Was it what;Getting
C
What was it that;She got
D
What was it that;Getting
It was not until she had arrived home _______ her appointment with the doctor. 
#85138
A
when she remembered
B
and she remembered
C
did she remember
D
that she remembered
It is _____ he often fails in exams____ makes his parents worried about him.
#84877
A
because;that
B
that;that
C
不填;that
D
what;that
It was ______ the old clock that the old man spent the whole morning at home.
#85513
A
repairing
B
repaired
C
to repair
D
in repair