题目内容

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

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

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

Now that we have learned to see things _____, we can find that there are two sides to anything in the world.

A. in part
B. from a perspective
C. on their part
D. in perspective

As a(n) _____ job, it requires much time and commitment and persistence.

A. unwilling
B. demanding
C. embarrassing
D. frustrating

The _____ to be better than others drives him to work harder than before.

A. uniqueness
B. eagerness
C. awareness
D. effectiveness