Part Ⅰ Vocabulary and Structure

Directions: There are 40 incomplete sentences in this part. For each sentence there are four choices marked A, B, C and D. Choose the ONE answer that best completes each sentence, and then write the choice in the brackets.

1、 John and I ______ friends for eight years. We first got to know each other at a Christmas party. But we ______ each other a couple of times before that.

           A. had been; have seen                      B. have been; have seen

        &n ……此处隐藏43312个字…… atening our environment, our health, and even our lives.

    In fact, people have many choices as their means of transportation. Besides private cars, people can go out by bike, by motorcycle, by bus, by train, etc. . Each of them may have its advantages and disadvantages.

    In my opinion, for the sake of our health and protecting our environment and saving energy, it is certainly better to go out by bike for most people who make short trips within several miles. It is not only a healthy way of taking physical exercises but also an active act of protecting the environment and saving energy, for it consumes much less fuel, nor does it produce any pollution.