题目内容

Overall, our study offers proof ______ students who worked more than 20 hours weekly were not comparable to their classmates.

A. which
B. whether
C.that
D. what

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We are proud of our hometown, which is ________ in coal and natural crystal(水晶石).

A. abundant
B. universal
C. remote
D. autonomous

Also,be totally ___ to what you do, as excellence is possible only with commitment.

A. commit
B. committee
C. committees
D. committed

Daniel brought a notebook along to the beach in case he was seized by sudden ________.

A. incentive
B. motive
C. inspiration
D. instinct

在网络图中，从开始节点到结束节点同时存在多条线路，其中持续时间最长的线路是( )。

A. 关键线路；
B. 关键工作；
C. 非关键线路；
D. 非关键工作；