1.lf my friend -come----（come) to my house tomorrow .l -will-let--(let) her see my new coat.
2.how long -have---- you -lived----（live) in Tianjin?for ten years .
3.Look!all the runners -are-running--（run) very fast .
4.MEIMEI -hasn't--finished---(not finish )her homework yet .She -is -doing---(do)it now .
5.The twins -were--flying--(fly) the kite when l saw them .
6There --will--be--(be ) a sports meeting on the playground next month .
7.-Have-----you -written------(write ) the letter?Not yet
8.Look at the sky .l"m sure it -is-going to rain---(rain)
9.We won"t go to the park if it -isn't---(not be ) fine .
10.l-have----just -had-----(have ) breakfast.
11.Who -paid----(pay) for the dinner just now?
12He--was-thinking----(thinik ) of some ohter things when the teacher called his name .
13Why --haven't----she -understood-----yet (not understand)
14Mr.Wang -has--taught---(teach) in this school since 1980
15.I---was-writing---(write ) a letter when she called me
16 -Have---- you -found----(find)your penknife Yes ,l have ,l found——（find ) it on my desk ten minutes ago