.________ gas leaks and similar accidents should occur, some responsible persons

题型：不详难度：来源：

.________ gas leaks and similar accidents should occur, some responsible persons should regularly inspect all the laboratories.

A．Unless

B．In case

C．Provided

D．Until

答案

解析

略

举一反三

. The production of television commercials must be professional ________ they aim at promoting good service, or public education.

A．when

B．no matter

C．if

D．whether

题型：不详难度：| 查看答案

. The prices have been going up, so that the richer you get, the less rich you are than ________ you think you ought to be.

A．that

B．/

C．what

D．which

题型：不详难度：| 查看答案

. The mother kissed her baby, ________ was in her arms.

A．which

B．that

C．who

D．whom

题型：不详难度：| 查看答案

. It is far better for one to drink milk, ________ one gets healthful nutrients, than to drink coffee, ________ contains harmful substances.

A．what, what

B．where, which

C．from which, which

D．in which, what

题型：不详难度：| 查看答案

. They are teachers and don"t realize the basic/primary rules and principles _____ to start and run a company.

A．in which

B．for whom

C．with which

D．of whom

题型：不详难度：| 查看答案