Did Mr. Zhu come to help you yesterday? — Yes, but I would rather _____. He caused me a lot of trouble.

Many teenagers put mobile gaming _________ other things and spend too much time on it.—That’s really bad.

Eventually the two sides reached an agreement ___ could not be taken the place of.

aged by my science teacher, I set about my studies on developing my product, I hope I will succeed in applying for a patent.

______ have proved great adventures,but we have done the greatest march ever made in the past ten years.