题目内容：
Their country has plenty of oil, __________ ours has none.
[ ]
A. when B. while
C. before
D. where
参考答案：
单选题：Their country has plenty of oil, __________ ours has none.[..
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B. while
C. before
D. where
B. while
C. before
D. where
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—What's going on between you and Peter? —We had a fight. I regarded him as my trustworthy friend_____ to my shock, he gave me away.[ ]A. unlessB. sinceC. ifD. until
_______you are familiar with the author's ideas, try readin..
_______you are familiar with the author's ideas, try reading all the sections as quickly as you can. [ ]A. So thatB. Now thatC. Ever sinceD. As long as
Another two hours , ____we will arrive at the Capital Airpor..
Another two hours , ____we will arrive at the Capital Airport, where your uncle will be waiting for us. [ ]A. but B. / C. orD. and
She's the equal of her brother________intelligence is conce..
She's the equal of her brother________intelligence is concerned,but she doesn't work hard at all. [ ]A. as well as B. as soon asC. as far as D. as long as
Please arrange an interview with the manger tomorrow, or it ..
Please arrange an interview with the manger tomorrow, or it is convenient to him.[ ]A. whenever B. however C. whicheverD. wherever