【正文】
A. es B. e C. will e D. is ing 2. I’ll go swimming with you when I ________ free tomorrow. be B. shall be C. am D. was A C 即時(shí)練習(xí): 4. When he got to the station, the train ___. A. left B. had left C. leaves D. has left ___ TV when the telephone ____. A. watched。 was ringing B. were watching。 rang C. watch。 rings D. are watching。 rang D B 即時(shí)練習(xí): Thank you