Please (check) your bill before you leave the shop and make sure that it is correct.
A. pay off
B. go over
C. look up
D. find out
Passage TwoQuestions 29 to 31 are based on the passage you have just heard.
A. More and more people are used to the Internet.
B. Cell pones are Becoming an important part of our life.
C. Postcards are in the danger of extinction.
D. Communications between people are becoming easier.
琼脂扩散试验(4℃进行)反应时间为
A. 72h
B. 24h
C. 3～7min
D. 30min
E. 48h
Large areas of Alaskan land remain (desolate) due to harsh climate.
A. barren
B. immature
C. inaccessible
D. passionate
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