生物化学课程的内容主要包括三部分（）、（）和（）。
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How does Mr. Green think of the trip?
A. Boring
B. Pleasant
C. Tired
D. Exciting
What is the change of the tour group from Canada?
A. Two people didn’t come.
B. One person didn’t come.
C. There are two more people in the group.
D. There is one more person in the group.
In order to give the tourists a good impression, the tour guide should offer （ ）service.
A. timely
B. enthusiastic
C. gracious
D. friendly
E. sincere
After the tour group arrives, the local guide should （ ）.
A. find the tour group
B. call the driver and tell him the group has arrived
C. verify the actual number of the tour group
D. check the baggage
E. tell the restaurant to prepare the meal for the group
F. help the tour group board the coach
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