问题
选择题
Studying alone, you are free to choose what to learn and when, ____ you don’t need others’ agreement.
A．while
B．if
C．though
D．as
答案
答案：D
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Studying alone, you are free to choose what to learn and when, ____ you don’t need others’ agreement.
A．while
B．if
C．though
D．as
答案：D