现在完成时练习题(含答案)一、填空1 Have you ever _(take) a train?2 It _(be ) more than three years since Jim _(leave) here.3 Have you _(make)friends with your new classmates yet?4 I _(have) my lunch and Im not hungry now.5 Jim has never seen a panda, _he?6 We _(be) good friends since we met at school.7 We cant find him anywhere. Perhaps he_(go) home.8 He _(read) the book before.9 Mr. Green _(teach) us a lot about social studies since Septem
