单项选择题

A．They extend their water pipes.
B．They give out faint cries.
C．They make noises to drive away insects.
D．They become elastic like rubber bands.
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单项选择题
A．They were drawing pictures.B．They were watching TV.C．They were making a telephone call.D．They were tidying up the drawing room.
A．They were drawing pictures.
B．They were watching TV.
C．They were making a telephone call.
D．They were tidying up the drawing room.
单项选择题
A．Membership in a co-op.B．The benefits of health food.C．Shopping in the supermarket.D．The current cost of food.
A．Membership in a co-op.
B．The benefits of health food.
C．Shopping in the supermarket.
D．The current cost of food.
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