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"How'sthebaby?""He'sgenerallyhealthy,buteverynowandthenhecold."a)hascaughtb)iscatchingc)willcatchd)doescatch

题目详情
"How's the baby?"
"He's generally healthy,but every now and then he__________cold."
a)has caught
b)is catching
c)will catch
d)does catch
▼优质解答
答案和解析
选D
every now and then 是时常、经常的意思,跟usually类似,应该用一般现在时.
不过题目还是有一点点小问题,感冒是catch a cold,冠词a一般不能省略.