题目内容

___

A. Behind the main desk.
B. The periodicals room.
C. A lost and found office.
D. The reference room.

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A. The sport of mountain climbing.
B. Classes the man is taking.
C. An exhibit the man saw in a museum.
D. A new activity the man is involved in.

A means of descending slopes.
B. A method of climbing cliffs.
C. A way to clean walls.
D. A type of graffiti.

A. Educating people about geology.
B. Cleaning up after careless people.
C. Photographing mountain peaks.
D. Rescuing people who are in danger.

A. Explore a cave with him.
B. Take some photographs.
C. Attend a meeting.
D. Examine a crystal.