单项选择 适中0.65 引用3 组卷298
He doesn’t know what __________ the problem.
A.to do |
B.do |
C.to do with |
D.do with |
15-16八年级下·江苏镇江·期中
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Simon is good at English, he always helps his classmates ________ English.
A.study | B.studies | C.studying | D.studied |
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