( )(3)你想别人介绍说着是你的弟弟Sam,可以说:A. This is my brother,Sam. B. He is Sam.
()It is green _____white. A. or B. but C. and
()It’s time to_____ a new beginning. A. start B. starting C. starts
()What did you_____ on the earth? A. buy B. buying C. bought
()They _____going to different schools. A. is B. are C. do
()I _____the name of a friend. A. write B. writing C. am write