We must take part in physical labor in order to__________ourselves mo-考呗网题库移动版

单选题 We must take part in physical labor in order to__________ourselves more closely with the working people.

A．identify
B．incorporate
C．combine
D．involve

参考答案A

解析:

单选题 Closer economic ties have been __________greater diplomatic warmth.

A．translated
B．transferred
C．transplanted
D．transmitted

单选题 We got to work and succeeded, after a good deal of__________ , in making our butter.

A．trial and error
B．morning and night
C．bitterness and hard
D．failure and success

单选题根据下面的内容，回答题.

Which of the following may be a density-independent factor that affects animal population?

A．Famine.
B．Tornadoes.
C．The number of predators.
D．The variety of food supply.