单项选择题

A．The five questions were not well designed.
B．Not all the questionnaires were returned.
C．Only a small number of students were surveyed.
D．Some of the answers to the questionnaire were not valid.
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单项选择题
A．They spent three hundred dollars on their vacation.B．They drew money than they should have from the bank.C．They lost their bankbook.D．They had only three hundred dollars in the bank.
A．They spent three hundred dollars on their vacation.
B．They drew money than they should have from the bank.
C．They lost their bankbook.
D．They had only three hundred dollars in the bank.
单项选择题
A．It provides them with the opportunity to watch performance for free.B．It provides them with the opportunity to make friends.C．It gives them the chance to do something creative.D．It gives them a chance to enjoy modem art.
A．It provides them with the opportunity to watch performance for free.
B．It provides them with the opportunity to make friends.
C．It gives them the chance to do something creative.
D．It gives them a chance to enjoy modem art.
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