题目内容

As an ideal _____ to the spread of SARS, this medicine is now in great demand.

A. barrier
B. commitment
C. challenge
D. access

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When her business goes wrong, she tends to _____ for advice.

A. get access to
B. come across
C. reach out
D. speak up

The most important for us now is to _____what is to be done next.

A. allow of
B. reflect on
C. feel like
D. remind of

It is best to _____ wear through friction in designing the parts of every machine.

A. have insight into
B. come up with
C. allow for
D. reflect on

Good habits of living have proved to be of much _____ to our health.

A. barrier
B. benefit
C. immunity
D. commitment