问题
选择题
Last Sunday he made a promise ________ he was free he would take me to Qingdao.
A．if
B．that
C．that if
D．whether
答案
答案：C
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Last Sunday he made a promise ________ he was free he would take me to Qingdao.
A．if
B．that
C．that if
D．whether
答案：C