— Did you find the missing couple in the mountain yesterday?— No, but we ____ to

题型：专项题难度：来源：

— Did you find the missing couple in the mountain yesterday?
— No, but we ____ to get in touch with them ever since. [ ]
A. have tried
B. have been trying
C. had tried
D. had been trying

答案

举一反三

— Come on, Kitty.
— Oh, good heavens! Both my legs are nearly to give out. I ____ for hours like a dog. [ ]
A. have been walking
B. had walked
C. was walking
D. walked

题型：专项题难度：| 查看答案

Do not disturb me. I ________ letters all morning and have written ten so far.[     ]
A．write
B．have been writing
C．have written
D．was writing

题型：同步题难度：| 查看答案

________ in a space suit in the base, the young man looks more like an astronaut I"ve been ________. [     ]
A. Dressed; admiring
B. Dressed; admired
C. Wearing; admiring
D. Worn; admired

题型：同步题难度：| 查看答案

We ____ on the project for two hours. Let’s have a rest.
A. have been working
B. are working
C. worked
D. had worked

题型：云南省期中题难度：| 查看答案

The final examination of this term is coming, so every one of us ________ for it these days[     ]
A．has prepared
B．prepared
C．has been preparing
D．was preparing

题型：同步题难度：| 查看答案