问题
选择题
______ it is a challenge for me to finish the task in such t'ime, I enjoy it. [ ]
A. Because
B. Though
C. Unless
D. Until
答案
答案：B
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______ it is a challenge for me to finish the task in such t'ime, I enjoy it. [ ]
A. Because
B. Though
C. Unless
D. Until
答案：B