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Reading books is very important for developing the students’ understanding of the world, ____?

A. is it               B. are they                C. isn’t it                   D. aren’t they

－ You haven’t seen a Yeti, have you?

 －______. How I wish to see one!

  A. Yes, I have      B. Yes, I haven’t       C. No, I have      D. No, I haven’t

The boy whose name is Justin is nowhere to be found, ______?

 A. is he           B. isn’t he            C. is it               D. isn’t it

I don’t think one country can solve the problem of pollution alone, ________?

    A. do I               B. may I                    C. can it         D. can’t it

Alice, you see to it that the children here are well fed, ______?

  A. don’t you             B. doesn’t she               C. will you                   D. would she

Many animals sleep a lot when young, but sleep much less when they get older, just       is the case with human being.

       A．as     B．which       C．what  D．it

Passengers, don’t occupy the chairs with your luggage,        ?

       A．don’t you B．will they   C．don’t they D．will you

Mum, please let us, Mary and me, go to Jack’s birthday party tomorrow, ______?

       A. can you      B. will you            C. shall we            D. may we

___ there are living creatures in the outer space as those on Earth hasn’t been proved until now.

   A. How          B. When                 C. Where          D. Whether

I don’t imagine Russ and his poor dog had a good time on the deserted island, _____?

       A. didn’t they               B. do I                  C. did they                   D. hadn’t they