The time and effort he has devoted during the past few years _____ trees in that village are now considered to be very important.

As a student, you must ______ your teachers.

In my opinion, no search engine can     Baidu in search scope（处理，研究某事的范围）

Sam         some knowledge of the computer just by watching others working on it．

This kind of cloth doesn’t    washing; its color will fade soon．

One island and two lakes _______________ the country.

This medicine will ____ him of his bad cold.

He has been working hard day and night, which, of course,      his tiredness.

The good thing about children is that they ________ very easily to new environments.