问题

We had better pay attention to some health problems that, when ________ in time, can become bigger ones later on.

A:not treated
B:not to be treated
C:not having been treated
D:not being treated

正确答案是：

同类题型

Make a note of the questions you want to ask when you revise your lessons. ______ , you will surely forget some of them.

We __________ take books out of the reading room. We _________ only read it here.

We should get prepared for dealing with________problems_________

We’re going to Mountain Yandang this weekend.— _____.

Hi, John. How was your school trip— _______. I saw many interesting things in the countryside.