题目内容

His total ___of the subject is truly surprising.How come he knows nothing about it?

A. unknown
B. knowledge
C. arrogant
D. ignorance

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If one child gets sick with chicken-pox, the rest of the children in the same kindergarten will be exposed to the danger of being ___.

A. infected.
B. hurt
C. affected
D. effected

Clear skies are no ___of continued fine weather; it may rain in the evening.

A. sign
B. guarantee
C. clue
D. trace

It is the hospital's policy to___ any patient who is suffering from an infectious disease.

A. differentiate
B. distinguish
C. isolate.
D. separate

Patients who are given the new drug will be asked to___ their heartbeat, temperature and blood pressure.

A. watch
B. care
C. notice
D. monitor