单项选择题

If any difficulties _______ , you can call me for help.

A．arise
B．happen
C．occur
D．take place
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单项选择题
Because of the severe international situation, the government has urged people to be _______ with food and water.
A．thrift
B．economic
C．economical
D．economy
单项选择题
I still remember the day I first met her, she _______.
A．had long hair
B．has long hairs
C．had long hairs
D．has long hair
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