单项选择题

If the appliance is defective, write directly to the manufacturer__________complain to your local consumer protection association.

A．then
B．or
C．but
D．though
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单项选择题
You __________ practice the drums while the baby is sleeping.
A．needn’ t
B．mightn’ t
C．mustn’t
D．won’ t
单项选择题
He is wearing sunglasses to protect his eyes __________ the strong sunlight.
A．of
B．off
C．from
D．away
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