问题

_ word “PM 25” repeatedly appearing in__ media reports, the public can’t help wondering what it really means

A:witnessed
B:accumulated
C:arisen
D:introduced

正确答案是：

同类题型

My parents were watching ________TV when I got home last night.

The old man lost his money and he has been worried ________

Ann is in hospital.____ Oh ,really? I ______ knowI ______ go and visit her

Could you tell me — Certainly. In 20 minutes.

_________ is that girl —She’s Mike’s sister.