目录: To the student To the teacher Thanks Execise numbers 练习序号 1-5 am/is/are 6-9 I am doing (present continuous) 10-14 I do/work/lie etc.(present simple) 15-19 I am doing and I do(present continuous and past simple) 20-22 have got 23-31 was/were and I worked/got/went etc.(past simple) 32-34 I was dong and I did(past continuous and past simple) 35-37 Review(present,present perfect and past) 53-56 is done/was done and is being done/has been done(passive) 57-59 be ...
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