问题

It’s best to stay indoors, ________when PM2.5 has reached dangerous levels.

A:exactly
B:possibly
C:especially
D:generally;

正确答案是：

同类题型

He got the first prize in a National Contest of Popular Music—OhThat’s what he _____ for years

2020, ____ of more than 30 satellites.

The headmaster was______ as to how to inform her ofthe news that her daughter failed to pass the exam again

Eventually, the husband could no longer ______ his wife’s complaints about his inability to make much money, and he divorced her.

The dish smells.It must be very delicious.