单项选择题


Questions 19～21 are based on the following monologue.
Why couldn’t the man open the door

A．His friend gave him the wrong key,
B．He didn’t know where the back door was.
C．He couldn’t find the key to his mailbox.
D．It was too dark to put file key in the lock.
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单项选择题
Where is this conversation taking place
A．In a classroom.
B．In a library.
C．At a secondhand bookstore.
D．In a museum.
单项选择题
What do we learn from the conversation
A．The police wants to talk to the main actor.
B．The main actor forgot to come
C．The main actor is delayed by traffic.
D．The main actor is busy buying jam on his way.
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