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We ________ last night, but we went to the concert instead.

A. must have studied     B. might study

C. should have studied   D. would study

This is certainly the case, but ____ it is a mistake or not I don’t know.

    A. if              B. even though        C. whether       D. that

Girl ____, she is much naughtier than a boy.

    A. although she was                  B. though she is  

    C. though was she                    D. although was she

This is an illness that can result in total blindness ____ left untreated.

    A. after          B. if            C. since         D. unless

I ____ see him yesterday.

    A. really          B. do             C. did              D. does

We should do more such exercises in the future, I think, ____ we did yesterday.

   A. as              B. which             C. that            D. than

----Did Jim come？

----I don’t know. He _______ while I was out.

    A. might have come     B. might come

    C. mush have come      D. should have come

  8. As she’s not here, I suppose she _____ home.

    A. must go                B. must have gone

    C. might go               D. might be going

— Mum, I’ve been studying English since 8 o’clock. _______ I go out and play with tom for a while ?

— No, I’m afraid not. Besides, it’s raining outside now.

A. Can’t         B. Wouldn’t           C. May not         D. Won’t

If I ever decided to quit, then nothing my parents or my coaches_____ say_____ change my mind. It's my life, not theirs.

A. could; would         B. could; should    

C. would; must          D. would; should