问题

We are bound to solve the present severe problem, ________ we act intelligently and promptly.

A:even though
B:unless
C:as long as
D:in case

正确答案是：

同类题型

下列词语中加线的字,每对读音都不相同的一组是( )

In communication, a smile is usually________ strongsign of a friendly and ________ open attitude.

We are all _______ in the game _______ “Travel in Space”.

1When summer __, somechildren will go to the seaside for fun.

Students who pass the test will be ______ to the next grade, as has been announced.