单项选择题

A. being weighedB. to weighC. weighedD. weighingThe tra……

The traffic rule says young children under age four and () less that 40 pounds must be in a child safety seat.

A. being weighed
B. to weigh
C. weighed
D. weighing

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单项选择题For many years, people () electric cars. However, making them has been more difficult that predicted.

A. had dreamed of
B. have dreamed of
C. dreamed of
D. dream of