问题
选择题
—You will fail the exam ______ you don't work hard.
—OK, I'll try my best. [ ]
A. and
B. though
C. but
D. if
答案
答案：D
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—You will fail the exam ______ you don't work hard.
—OK, I'll try my best. [ ]
A. and
B. though
C. but
D. if
答案：D