单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A. A fuel that burns cleanly.
B. An oil additive that helps cool engines.
C. A material from which filters are made.
D. An insulating material sprayed on engine parts.
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单项选择题
A. Before six.B. At six.C. After six.D. After seven.
A. Before six.
B. At six.
C. After six.
D. After seven.
单项选择题
A. To determine who will graduate this year.B. To discuss the seating arrangement.C. To choose the chairperson of the ceremonies.D. To begin planning the graduation ceremonies.
A. To determine who will graduate this year.
B. To discuss the seating arrangement.
C. To choose the chairperson of the ceremonies.
D. To begin planning the graduation ceremonies.
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