问题

He is believed____________ in at his office on his way home
A:dropping
B:to have dropped
C:having dropped
D:to be dropped
B:to have dropped
C:having dropped
D:to be dropped
正确答案是:
同类题型
This new-type machine____________little room.
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talks to me like a child, _______ really annoysme.
______ we clean the classroom at once–No, you _____. You____ clean it afterschool.