单项选择题


Questions 19-22 are based on the following dialogue:
Which is not true about solar heat collector panels

A．They look like sandwiches.
B．They can heat but not cool homes.
C．They cost about ＄ 300 each.
D．They are placed on rooftops.
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单项选择题
What does the man mean
A．The pool will be open all week.
B．The weather will cool down soon.
C．The woman should go swimming.
D．He prefers to stay inside in hot weather.
单项选择题
Where did the woman learn about dolphins
A．In a book..
B．From a television program.
C．During a trip that she took..
D．From a lecture.
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