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Studentsmustn'tsmokeordrinkwhile＿＿atschool.A.studyB.studyingC.tostudyD.studied
题目详情
Students mustn't smoke or drink while＿＿ at school.
A.study
B.studying
C.to study
D.studied
A.study
B.studying
C.to study
D.studied
▼优质解答
答案和解析
B
while后面只能加进行时
而且此句是一个省略
应该是 Students mustn't smoke or drink while they are studying at school.
while后面只能加进行时
而且此句是一个省略
应该是 Students mustn't smoke or drink while they are studying at school.
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