问题

Have you been to the United States?—Yes, only onceI ________ there only for seven days

A:stayed
B:had stayed
C:have stayed
D:was staying

正确答案是：

同类题型

If he ____ my advice , he wouldn’t have lost his job.

They are said to have developed a new______ to teaching, which is said to improve classroom teaching greatly.

He lost his favorite watch, _________ made him very sad.

is no _____ that the Chinese peoplewill present to the world a successful, splendid and unforgettable exposition.

, she does get angry with him sometimes.