单项选择题

"The car ran out of gas!"
"That ______ the cause. I filled the tank this morning."

A．mustn't be
B．must have been
C．can be
D．can't have been
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单项选择题
We had to go miles to find a restaurant, it ______a holiday.
A．being
B．was
C．to be
D．is
单项选择题
It is reported that a conference on world communications and transportation will be ______ by the British government next month.
A．subscribed to
B．given out
C．presided over
D．put on
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