The poor boy is in danger. We should do all we help him out.A. can doB. can toC. can to d

发布时间：2020-08-15 00:14:01

The poor boy is in danger. We should do all we      help him out.
A. can do
B. can to
C. can to do
D. can

网友回答

A. can do
(答案→)B. can to
C. can to do
D. can
解析：这是一个常见结构，补充完整就是：We should do all we can do to help him out。
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