_ is high time you,lent her a hand.
A. it
B. that
C. this
D. what
查看答案
Even if he were here himself he should not what to do.
A. 对
B. 错
Nobaby could save him even though huatuo should come here.
A. 对
B. 错
According _some studies half of the sevice jobs pay low wages.
A. to
B. for
C. on
D. in
Let me more _to my next main point.
A. on
B. in
C. at
D. for
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