题目内容
The teacher did all he could ________the poor students.
A. help B. to help C. helping D. to be helped
B
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华东师大版一课一练系列答案题目内容
The teacher did all he could ________the poor students.
A. help B. to help C. helping D. to be helped
B
华东师大版一课一练系列答案