sition, however, ________ you are applying, isnot quite a well ­paid one.

You can get the best result ______you carry out the experiment under the desired conditions

下列词语中，没有错別字的一项是（ ）

The teacher told us that everyone has an importantrole ________in protecting the earth from________.

He always brings me a pretty gift 　　　　 he comes to visit me.