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5. What I want to know is ______or not he likes the gift given by us.

9.—I fell sick!


--I think it is _______ you are doing too much.

7. I can’t understand this passage _______ there are so many new words in it.
wish to thank Professor Smith, without _____ help I would never have got this far.

What I want to know is ______ he likes the gift given by us.

—I fell sick!


—I think it is _______ you are doing too much.
wish to thank Professor Smith, without _____ help I would never have got this far.
What I want to know is ______ he likes the gift given by us.
present perfect tense and past simple
—I fell sick!--I think it is _______ you are doing too much.
present perfect continuous tense and present simple
That is _________ I cannot agree.
1.妈妈一直她的安全而担心着。