_______ you work hard, you won’t solve this problem.A．EvenB．AsC．UnlessD．Since
题型：不详难度：来源：
_______ you work hard, you won’t solve this problem.| A．Even | B．As | C．Unless | D．Since |
|
答案
| C |
解析
Even即使，甚至；As因为，由于；Unless除非……否则，如果不；Since
自从，因为。句意：除非你努力学习，否则你不能解决这道题。所以选C。 |
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