问题

Danny _______ hard for long to realize his dream and now he is popular.
A:works
B:is working
C:has worked
D:worked;
B:is working
C:has worked
D:worked;
正确答案是:
同类题型
Strange! The two brothers have nothing _____.
________were you born, Kate—I was born in New York, America.
Sam ______ some knowledge of the computer just by watching others working on it.
A lot of food __around the world every year. We must do something for it.
May I borrow these two books, please?—Yes, you can______ them for two weeks.