The windows after school is over.
| A．usually close | B．usually closed |
| C．are usually closed | D．are usually closing |
Hurry up! The train _____ in two minutes.
| A．go | B．went | C．has gone | D．will go |
I think it will be difficult ___ a robot ____ the same things as a person.
| A．as, to do | B．for, to do | C．for ,doing | D．as, doing |
He is very happy , because he _____ in a big apartment next year.
| A．live | B．lives | C．will live | D．will living |
—How many birds can you see in the trees?
—I can see _________ birds in them.
| A．hundreds of | B．five hundreds |
| C．hundred of | D．five hundreds of |
A dog robot could help ____ the room.
| A．cleaning | B．getting | C．clean | D．get |