Though badly _____, the girl remained outwardly calm.
| A．frighten | B．frightened | C．frightening | D．fright |
When I ________ home, I caught a thief stealing from a passerby.
| A．headed | B．was heading |
| C．has headed | D．had headed |
Up to now, thousands of red phone boxes, the old image of Britain, ________ due to mobile phones.
| A．removed | B．have removed |
| C．were removed | D．have been removed |
This is a promising company as its employees ________ to think outside the box and develop creative solutions.
| A．encourage | B．have encouraged |
| C．were encouraged | D．are encouraged |
I can't understand why he ________ so selfish. He isn't usually like that.
| A．was | B．had been |
| C．is | D．is being |
—How long have you been going to work on foot?
—Since last month when I ________ from a heart attack.
| A．recovered | B．have recovered |
| C．was recovering | D．would recover |