问题
选择题
I called ________ his house this morning, but he wasn’t in. So I left a message telling him I would call______ him the next day.
A．on; on
B．at; at
C．at; on
D．on; at
答案
答案：C
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I called ________ his house this morning, but he wasn’t in. So I left a message telling him I would call______ him the next day.
A．on; on
B．at; at
C．at; on
D．on; at
答案：C