题文
The speed of cars is usually limited __________30 miles per hour on the busy city street.
| A．by |
| B．at |
| C．to |
| D．for |
推荐试卷
The speed of cars is usually limited __________30 miles per hour on the busy city street.
| A．by |
| B．at |
| C．to |
| D．for |
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