问题
选择题
You were _______ to take your shoes off when you entered the school lab, but you didn’t.
A．invited
B．supposed
C．selected
D．approved
答案
答案：B
be supposed to do sth. 意为“应该做……”。
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You were _______ to take your shoes off when you entered the school lab, but you didn’t.
A．invited
B．supposed
C．selected
D．approved
答案：B
be supposed to do sth. 意为“应该做……”。