---Has Tom finished his composition yet?
---I have no idea, he _____ it this morning.
| A．would write | B．has written | C．wrote | D．was writing |
His dog did everything he told it to do. ___ a most obedient animal.
| A．It is | B．It were | C．It are | D．It was |
___ the police three months to recover the stolen things.
| A．It needed | B．It kept | C．It spend | D．It took |
___ a very rough sea, with waves ten metres high.
| A．It were | B．This will be | C．It was | D．There’ll be |
It ___ the students in your class who came to see you then.
| A．is | B．was | C．were | D．are |
It’s impolite ___ you to ask one’s private affairs.
| A．for | B．of | C．to | D．on |