问题
选择题
As students, we are supposed to spend more time _________ .
A． study
B．studied
C．studying
D．to study
答案
答案：C
主语+spend time doing sth，表示花费时间做某事，故选答案为C
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As students, we are supposed to spend more time _________ .
A． study
B．studied
C．studying
D．to study
答案：C
主语+spend time doing sth，表示花费时间做某事，故选答案为C