________ China has been a member of WTO, English is more important.
A. Since
B. Though
C. When
D. If
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_______ Chinese, we study English, Maths and physics in school.
A. Except
Besides
C. Beside
D. Without
Could you tell me ______ the singer will come to our school or not?
A. If
B. Whether
C. That
D. What
My best friend and I haven’t seen each other _________ she went to the USA 10 years ago.
A. when
B. if
C. although
D. since
---Li Ming, are you leaving for Hangzhou for trip tomorrow?-No. It will be three days ________ I start my trip.
A. after
B. as
C. before
D. when