The answer to this question is ()
A. Limited driving range.
B. Huge recharging expenses.
C. The short life of batteries.
D. The Stafford high price.
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The answer to this question is ()
A. They need to be further improved.
B. They can easily switch to natural gas.
C. They are more cost-effective than vehicles powered by solar energy.
D. They can match conventional motor cars in performance and safety.
The answer to this question is()
A. The woman is the manager's secretary.
B. The man found himself in a wrong place.
C. The man is the manager's business associate.
D. The woman was putting up a sign on the wall.
The answer to this question is ()
A. He needs more time for the report.
B. He needs help to interpret the data.
C. He is sorry not to have helped the woman.
D. He does not have sufficient data to go on.
The answer to this question is ()
A friend from New York.
B. A message from Tony.
C. A postal delivery.
D. A change in the weather.
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