1. Police have ________ to the public to come forward with any information which might help them in their inquiries.
A）urged
B) claimed
C) appealed
D) called

2.His understanding made a deep impression ________ the young girl.
A) in
B) on
C) for
D) to

3.They have been trying to arrive at a practical solution ________ the problem.
A) in
B) to
C) on
D) with

4. Some hard plastics can be ________ metals in manufacturing machine parts.
A) substituted for
B) taken place
C) replaced in
D) given way to

参考答案及解析：

1．urge催促, 力劝，claim声称, 主张, 需要，appeal请求, 呼吁, 上诉, call呼叫, 召集, 称呼, 认为, 命名, 打电话。所以正确答案应该选择C。
2．impress on 给...深刻印象(使铭记,使感动). 所以正确答案应该选择B。
3. solution to the problem固定用法，“问题的解决办法”， 所以正确答案应该选择B。
4．substituted for代替... 替换..., 取代... take place 发生，replace 指“代替某人”或“取代已经失去的、毁坏的或用坏的东西”, 如: We replace defective tubes.我们更换有毛病的管子。
give way to 让路,让步, 所以正确答案应该选择A。