In English class, our teacher often creates an environment _____________ we are given the opportunity to solve problems ourselves.

The manager demanded that the workers extra hours to complete the task ahead of time

D【解析】试题分析：考查动词辨析：

We would appreciate it if customers don’t______ toleave their suggestions and expectations for our product

He deserves to gain a high score in the coming exam, as he _________ preparations for it