With a lot of tough problems, the pilot was still calm, cool and collective under pressure

发布时间：2020-08-16 17:05:22

With a lot of tough problems    , the pilot was still calm, cool and collective under pressure.
A. solve
B. solved
C. solving
D. to solve

网友回答

A. solve
B. solved
C. solving
(答案→)D. to solve
解析：本题考查非谓语动词。根据题意可知，问题仍没有被解决，故用不定式，故选D。
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