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【題目】_______ many of us today take the television for granted, it’s actually one of the greatest invention of the 20th century.

A. IfB. UnlessC. WhileD. Since

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【題目】The upset mother thought to herself, “If only I ______ what's going on in my little boy's head right now.”
A.know
B.knew
C.have known
D.had known

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【題目】At the age of 14, Father had to leave school and start working. There would be no one to support the family _______ he not worked.
A.did
B.has
C.had
D.was

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【題目】Previous problems or bad experiences with test-taking can be an invitation _____ a worse performance in the next test.

A. withB. inC. beyondD. to

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【題目】The first thing you must remember is that in order to succeed, it is almost compulsory that you ______ optimistic.
A.be
B.are
C.must be
D.have been

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【題目】Loud music can do harm to our ears, so when listening to a player, you shouldn’t ____too high.

A. move it upB. turn it upC. put it upD. make it up

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【題目】—Did you make it at last?
—Yes. But for your help , it ________a serious loss.
A.would cause
B.must have caused
C.would have caused
D.may cause

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【題目】Teenagers should be encouraged to keep healthy m and physically.

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