At times the balance in nature is ______, resulting in a number of possibly unforeseen effects.
| A．confused |
| B．puzzled |
| C．disturbed |
| D．troubled |
After seeing the movie.____.
| A．the book was read by him | B．the book made him want to read it |
| C．he wanted t read the book | D．the reading of the book interested him |
The lecture began by _____us where the island was and went on _____about its history.
| A．telling ,talking | B．to tell ,to talk | C．telling , to talk | D．be told ,talking |
The sentence needs ______.
| A．to improve | B．improve | C．improving | D．improved |
.As she is looking forward to ______from me ,please remember _______this letter on your way to school.
| A．hear ,post | B．hearing ,to post | C．be heard ,posting | D．be hearing, to posting |
_____from the moon ,our earth ,with water ______seventy percent of its surface, appear as a “blue ball”
| A．See ,covered | B．Seeing ,covering | C．Seen ,covering | D．To see, to cover |