问题补充:
he is very busy, he spends at least two hours every day surfing the Internet in order to find out the latest development in science and technology.
A. Even though
B. When
C. Unless
D. Whether
答案:
(答案→)A. Even though
B. When
C. Unless
D. Whether
解析:可联系答.案.网客服索取。
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