单项选择题

Group activities will be organized after class_______children develop team spirit.

A．helping
B．having helped
C．helped
D．to help
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单项选择题
I’ve developed a______for African music since my trip last year to Nigeria.
A．way
B．relation
C．taste
D．habit
单项选择题
Motorists_______to switch off their phones while driving nowadays.
A．require
B．are required
C．have required
D．will be required
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