—I hear you have an experience in the Royal Air Force. Is that ture?—Yes. I ______ in the Royal Air Force for six years. A. served B had served C joined D have joined
What Yang Liwei wanted to do when he got out of the spaceship was__________the joy with all the Chinese.
—Mum,why do you give me so much popcorn?—__________the boring time.
What did the librarian__________out of the library?
Mr.Smith was much surprised to find the watch he had had__________was nowhere to be seen.
__________along the quiet road at forty miles an hour,and then an old man suddenly started to cross the road in front of me.