题目内容

Protocol was____ enabled him to make difficult decisions with ever looking back.

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

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The woman had persuaded him to do____ he was hired never to do-reveal the combination for the lock on the entrance.

A. one thing
B. such one thing
C. any one thing
D. the one thing

The bad news was that he could be a very dangerous person____ he choose to be.

A. should
B.could
C. might
D. must

管道运输的对象不包括( )。

A. 石油
B. 固体
C. 浆制物体
D. 气体

铁路运输的外部竞争从具体表现形式上看,在低值商品运输上主要与()竞争。

A. 管道运输
B. 汽车运输
C. 水上运输
D. 航空运输