4. 解析:选A。in contrast with/to表示“与某事物比较起来”，此处作状语,表示比较。

3. 解析:选B。cure sb. of sth.指“治好、改好某人的某种疾病或坏习惯等”，而consider ...as ...表示“把……当作……来看待”；deal with一般表示“对付，处理”；remove from一般指“移除，除掉”，一般不能用于该结构中。

2. 解析:选B。把……当作……来看待，要用treat/regard/look on ...as ...结构，look, realize，recognize无此用法。

4. The white snow mountains contrast sharply with the brilliant blue sky on the Qinghai-Tibetan plateau, which is a great wonder.

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3. To our great astonishment, the modern hotel was completely burnt out, only the walls left.

2. After midnight the gathering on the street still went on, and the situation gradually got out of control.

5. had; would lend

4. had never met

3. could speak

2. Seeing; reaching