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B.a;the
C./; a
D./ ;the 2.Recently, he seemed to lose the ________ of his life and has given up many chances.
A.sense
B.course
C.direction
D.purpose 3.—It is careless of him to________ the books on the table. What a mess! —Maybe he is getting uncomfortable from staying up too late every day.
A.knock over
B.knock down
C.knock off
D.knock on 4.—Do you know the percentage of the people who want to leave the Earth in China —I think there is ________. In fact, there is ________ on other planets that can help people survive.
A.nothing; none
B.none; nothing
C.nobody; none
D.none; no one 5.Sam thought his robot broken ________ Jim pointed out that he’d forgotten to turn it off.
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