21.The video is too loud,could you ________,please?
A.turn up it B.turn down it C.turn it up D.turn it down
20.-- ________ have you been studying in your school? --For two years.
A.How many B.How often C.How long D.How much
19.________ you speak German? ________ Yes.a little.
A.Can B.should C.May D.Must
18.He ________ his homework when I went to see him.
A.did B.was doing C.is doing D.does
17.Tom,your brother is young.You ________ take care of him.
A.could B.will C.would D.should
16.He didn't tell me when he ________.I'll tell you if he ________.
A.will come;comes B.will come;will come
C.comes;will come D.comes;comes
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