Ⅰ.单词拼写
1．I was_going (go) along the street looking for a place to park when the accident occurred.
2．Ladies and gentlemen, please fasten your seat belts. The plane is_taking (take) off.
3．Hurry! The school bus is_waiting (wait) for you!
4．I got on to him and explained some of the things I had_been_thinking (think) of those days.
5．He was_phoning (phone) someone when I came in, so I nodded to him and went away.
6．I felt very tired when I got home, and I went (go) straight to bed.
7．He was_leaving (leave) very early so he packed the night before.
8．She has_been_writing (write) the letter since two hours ago.
9．In the past ten years, many new schools have_been_built (build) up in our city.
10．She had_been_studying (study) English for many years before entering the college.
