At times the balance in nature is____, resulting in a number of possibly unforeseen effects.
| A．confused | B．puzzled | C．disturbed | D．troubled |
“Please don’t forget ______ the door when you leave.” “No, I won’t forget ______ it.”
| A．to lock; to lock | B．to lock; locking | C．locking; to lock | D．locking; locking |
______ his poor handwriting, he practises writing Chinese characters with a Chinese writing brush every day.
| A．Improving | B．Improved | C．To improve | D．Improve |
— What's wrong with her? Look at her ______ eyes.
— Yes, she must have been ______.
| A．surprised; surprised | B．surprised; surprising |
| C．surprising; surprised | D．surprising; surprising |
He reads newspapers every day to keep himself _______ about what's going on in the world.
| A．inform | B．informing | C．informed | D．being informed |
He wrote a letter to me _______ that his trip to Japan had been put off because of the bad weather.
| A．inform | B．informing | C．informed | D．being informed |