—Haveyoufoundthemissing?couple

—Have you found the missing?couple in the mountain ?
—No, but we______hard to get in touch with them．

A．have tried

B．have been trying

C．had tried

D．had been trying ．

登录免费查看答案和解析

相关试题

---How long has your brother been working in this factory?
---_____he dropped from school in 2010.

A．When

B．Until

C．Since

D．Before

收藏答案/解析

I am very grateful to my high school teachers, without _____help I wouldn’t be so excellent.

A．whom

B．their

C．which

D．whose

收藏答案/解析

Measures _____to stop housing prices from rising too fast, but it remains to be seen whether they still work.

A．are taking

B．had been taken

C．have taken

D．are being taken

收藏答案/解析

The young man is determined to _____a small business of his own after he graduates from college.

A．set up

B．make up

C．bring up

D．turn up

收藏答案/解析

On December 10,2013,many world’s top leaders went to Johannesburg _____Nelson Mandela, who had passed away.

A．in honor of

B．in favor of

C．in search of

D．in return of

收藏答案/解析