_____ I catch a cold, I have pain in my back.

A. convinced

B. be convinced

C. convincing

D. having convinced

A. the hour

B. an hour

C. hour

D. the time

A)from B)against C)to D)with

A)down B)off C)out D)over

A) with B)through C)in for D)from 

A) in line with B)in case of C)for the sake D)at the risk of

A) illustrated

B) hinted

C) cited

D) displayed

A) a low – spirited state.

B) a worsening state of health.

C) old age.

D) nervous tension

A.has no smell

B.is tasteless

C.has vitamins

D.is flavored

A. 分裂、生长 B. 生长、分化 C. 生长、分裂 D. 分裂、分化