{01}_____ he changes his mind, I won"t promise to help him.
A.Unless
B.If
C.Though
D.Since
解析：
本题选A。
{02}To live in honor, _____ he came from a poor family, was his ambition.
A.though
B.if
C.unless
D.however
解析：
本题选A。
A.Unless
B.If
C.Though
D.Since
解析：
本题选A。
{02}To live in honor, _____ he came from a poor family, was his ambition.
A.though
B.if
C.unless
D.however
解析：
本题选A。
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