The baby is generally healthy but every now and then he a cold.A. has caughtB. is catch

问题补充：

The baby is generally healthy, but every now and then he a cold.

A. has caught

B. is catching

C. will catch

D. does catch

答案：

A. has caught

B. is catching

C. will catch

(答案→)D. does catch

解析： every now and then意为“有时，偶尔”，应与一般现在时连用。does表示强调。