题目内容

I love ice-cream,______ I can't eat too much, because I don't want to be fat.

A. and
B. but
C. or
D. so

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She doesn't send emails _____watch movies on computer.

A. and
B. or
C. so
D. but

There are no buses, ______you'll have to walk.

A. so
B. or
C. but
D. for

Amy is ______. She often helps old people cross the road.

A. careful
B. helpful
C. hard-working
D. sporty

测距方法有( ).

A. 扩频法
B. 带外法
C. 动态法
D. 带内法

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