He kept smiling secretly and we were all wondering that made him so happy.
Last year the number of the students who graduated with a driving license reached 200,000, a(n)________ of 40,000 per year.
Only after they had discussed the matter for several hours ________ a decision.
I don't think ________ possible to master a foreign language without much memory work.
Child as he was, he ________ a good idea to solve the problem.
With the development of science and technology, the prices of TV sets have ________.