—So hard in the past few years that he has made great progress in English.—I can see that, only a few mistakes in this exam.
As the Internet is expanding day by day, the opportunities for crime ______ as well.
— Have you finished your essay? — Half when you come back.
The visitor asked to have his picture taken _________ stood the famous tower.
Mr. Wang made up his mind to devote all he could ____ his oral English before going abroad.
Staying in a different country, just watch others to see _____ they act to decide what the best to say is.