A-A+
Mr. Thompson was very uncertain ______whether
问题详情
Mr. Thompson was very uncertain ______whether it was the right decision in teaming up with his coworker, Mr. Barns.
A．for
B．if
C．as to
D．even though请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
语法：介词1．选项由介词和连词构成。2．空格后已有连词whether引导名词性从句，因此连词(B)选项和(D)选项排除3．as to和介词about意义相同。与句意相符，因此(C)为正确选项。
