问题

you find the missing couple in the mountainyesterday——No, but we _____ to get in touch with them eversince.

A:have tried
B:have beentrying
C:had tried
D:had beentrying

正确答案是：

同类题型

The book ______ for adults is not suitable for teenagers to read.(西城区)

We should know that we can only reach the top if we are ready to __________ and learn from failure.[ ]

This is the most beautiful picture __________ I have ever seen.

_____ that dress when he first sawyou in the street

Please stop smoking. Look at the sign.— Oh ,sorry. I see it.