There is a ______ of impatience in the tone of his voice.

单项选择题The air of countryside is cleaner than ______ of city, but I don't like to live ______ far.

单项选择题We（）on this project for four hours. Let's have a rest.

A. are working
B. have been working
C. worked
D. had worked

单项选择题I'm tired out. I ______ all afternoon and I don't seem to have finished anything.

单项选择题This area of the park has been specially ______ for children, but accompanying adults are also welcome.

单项选择题One of the few things you say about English people with certainty is that they ______ talk a lot about the weather.

单项选择题—Now that you like the house with a garden, why not buy it —Well, I can't afford （） house at present.

A. that expensive a
B. a such expensive
C. that an expensive
D. a so expensive

单项选择题______ is best known for the technique of dramatic monologue in his poems.

单项选择题All but one ______ here just now.

单项选择题Tim is in good shape physically（）he doesn't get much exercise.

A. if
B. even though
C. unless
D. as long as

单项选择题I can't go to the New Year's concert，______，100 dollars is just too much for me to spend in one evening．