问题

It is uncertain ___ side effects these weight-loss drugs will bring about, although hundreds of thousands of patients have taken it

A:that
B:whether
C:how
D:what

正确答案是：

同类题型

The bus ____ at six, but it arrived an hour later.

Our English teacher told us to find out ____ the differences between American English and British English lie.

Great attention must be paid ____ welfare, especially in the poor area.

There seemed no end to theirtroubles; nowhere _________ upon a path.

They have clothes