题目内容

长用的掏槽方式有(),()和()三种。

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回采巷道是指形成()及其服务的巷道。

Wellman said he is not trying to send any _______ to disabled people by climbing.

A. message
B. suggestion
C. movement
D. present

It was Mike Corbett _______ first brought up the idea of Mark Wellman’s climbing again.

A. whose
B. whom
C. which
D. who

He was 22 when he slipped while _______ and fell 50 feet.

A. climb
B. climbed
C. climbing
D. to climb

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