1. The keys of the house (have) ………. been lost.
2. The plan as well as the proposals (be) ………. . to be presented in the coming Monday meeting.
3. The box of ribbons for the electric typewriter (have) ………. . been misplaced.
4. It is disconcerting to believe that every possible candidate (have) ……. . been rejected for one reason or another.
5. There (have) ………. been more excitement in this city about a sporting event.
6. To me, Mathematics (be) ………something very easy to master.
7. If nobody (have) ………. . bought that car from the dealer, then you should return and make another offergiúp mình với ạ mình đang cần gấp