1.I needn’t go out with my friends today.  It................................................................. 2.Minh last wrote to his pen pal five months ago.  Minh hasn’t ................................... 3.They usually wore jeans when they were young.  They used....................................... 4.He spent two days writing a report last night.  It...................................................... 5.She made me cry last night.  I.................................................................................... 6.You keep forgetting his homework  You are.............................................................. 7.I intend to go out with my friends tonight. . I am ...................................................................................... 8.My mother did this work in 45 minutes  It................................................................................. 9.Having a vacation abroad is very interesting  It is.......................................................................................... 10.We started living here fifteen years ago.  We have ......................................................................................... 11.You have to finish your homework tonght.  It is........................................................................................... 12.Let's meet inside the center at the cafe' corner  How........................................................................................... 13.You ought not to be lazy now.  You’d........................................................................................ 14.It isn't necessary for you to set off early.  You don’t ...................................................................................... 15.If he doesn’t come here tonight, He can’t meet his friends  Unless............................................................................................