I think _____ important to tell you about it. [ ]A. this B. that C.

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I think _____ important to tell you about it. [     ]
A. this
B. that
C. him
D. it

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举一反三

It’s dangerous for us _____ trees.[     ]
A. to climb
B. climbing
C. climb
D. climbed

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将下列句子改为同义句，每空一词。1. To eat a balanced diet is very important.
    ________very important________eat a balanced diet.
2. They are watching TV at home now.
    They are watching TV at home________ ________ ________.
3. What"s wrong with your sister?
    What"s________ ________with your sister?
4. She has a sore throat.
    There is something________ ________her throat.
5. There is a lot of milk in the bottle.
    There is________ ________milk in the bottle.

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_____ is important for us students to do well in our lessons.   [     ]
A. It
B. That
C. This
D. What

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We found _____ impossible to finish the work in such a short time.[     ]
A. it"s
B. that was
C. it
D. that

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I think ______ necessary for us ______ the birds.      [     ]
A. it ; protect
B. its; to protect
C. it"s ; protecting
D. it; to protect

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