1.he(cross) ............................the street when i (see)....... him yesterday . 2. he(leave)................home 2 weeks ago and we (not hear)............from him since 3.what .......you(do)........ at that time last week ? 4.last sunday,an(watch).................tv when tom (come)..........here 5.john(do).................his homework already 6.yesterday while i(water)..................the garden ,it(begin).........to rain 7.he (read).................53 pages so far 8................he(write).................a novel at present? 9.they(not speak)........................to each other since thay quarreled 10.listen!somebody(knock)...........................the door 11. please don't say anything while i(learn)...................my lesson 12.up to now,i(do)........................every exercise in this book 13.mrs green(take)....................alice to the dentist's many times 14