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1.I did nothing but _____ my lessons last Sunday.A.go over B

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1.
I did nothing but _____ my lessons last Sunday.
A.go over B.to go over
C.went over D.going over
2.
_______ today,would we be able to get there by Tuesday?
A.Were we leaving B.If we leave
C.Would not come D.Were we to leave
3.______ i known it,i would have told you.
A.Have B.If
C.Had D.Having
4.
When a pencil is partly in a glass of water,it looks as if it_____.
A.breaks B.has seen
C.were broken D.had been broken
5.
I didn't see your sister at the meeting.If she______ ,she would have met my brother.
A.has come B.did come
C.came D.had come
6.
-I'm leaving now.
-________you turn off the lights and the computer.
A.To make sure B.Make sure
C.Made sure D.Making sure
【追加规则】
1.正确选择(每题一分 共6分)
2.明确、正确解答(每题两分 共12分)
3.使我明白了...(酌情加2—7分)
1.I did nothing but _____ my lessons last Sunday.A.go over B
1.A 当but做介词“除了……”时,如其前面出现实义动词do的形式,则but后接不带to的不定式.上周日,除了做功课外我什么也没有做.
2.D 由主句中的would...可知此处考查对if条件句表示虚拟语气的用法,对将来的虚拟条件句可采用三种形式:1.were to+动词原形 2.should+动词原形 3.用动词的过去时.如果从句含义were或should,had则可以把were,should或had提前,把if省略.故答案为D.
3.C 考查对过去的虚拟语序.由主句中的would have told可知该题是对过去的虚拟,这时if条件句必须用过去完成时,如果从句含义were或should,had则可以把were,should或had提前,把if省略.故选C.
4.C 考查as if虚拟语气.as if的从句用一般过去时表示现在,Be动词的过去时用were不用was.故答案为C.
5.D 考查对过去的虚拟语气.由句子中的i would have met可知该句是对过去的虚拟,这时if条件句必须用过去完成时.故答案为had come.
6.B 考查祈使句.you turn off..是宾语从句,其他三个选项后均不能接宾语从句.
请采纳为“满意答案”.祝进步.