问题
选择题
—Can you watch TV ________ school nights?
—Yes, but I have to be _______ bed ________ ten o’clock.
A．in; on; by
B．on; on; in
C．on, in; by
D．in; in; at
答案
答案：C
此题重点考查介词的固定用法。On school nights；in bed；at ten o’clock。