问题
This kind of seafood is likely to go bad _____ it is treated immediately after it is caught from the sea.
A:as
B:unless
C:since
D:when;
B:unless
C:since
D:when;
正确答案是：
同类题型
The music is too loud,would you mind______
There anEnglish film in the cinema tomorrow.
Who’s that boy–Liang Bo. He is _____ very popular singer in Voice ofChina.
Excuse me, could you tell me ________ — In five minutes.
might one day explore other planets, the______designer of Chang’e-I told China Economic Weekly