–Cathy, can you answer the door? I ______ the room. –I’m coming, mum.
| A．clean | B．cleaned |
| C．have cleaned | D．am cleaning |
Nine thousand guests took part in the outdoor ceremony, that impressed so many people at the White House．
| A．that | B．this | C．it | D．one |
The local government is trying all out to find out who is the forest fire．
| A．to blame for starting | B．to blame to start |
| C．to be blamed for starting | D．to be blamed to start |
---How can we reduce CO2 in our home?
---It’s easy． off your TV or computers when you’re not using them, and you’ll greatly reduce it．
| A．Turn | B．To turn | C．Turning | D．Turned |
---Have you been ?
---Yeah．As a matter of fact, I’ve been going to the gym for half a year now．
| A．carrying out | B．turning out | C．making out | D．working out |
Mr Li has some trouble sleeping, so dinking a glass of milk before going to bed every night is his common．
| A．practice | B．knowledge | C．experience | D．duty |