Polar bears live mostly on __________ sea ice, which they use as __________ platform for hunting seals.
| A．a; a | B．a; the | C．不填; a | D．the; 不填 |
The best moment for the football star was _______ he scored the winning goal.
| A．where | B．why |
| C．how | D．when |
I borrow the book Sherlock Holmes from the library last week, ______ my classmates recommended to me..
| A．that | B．when |
| C．which | D．Where |
Cheer up, Maria! You can also enjoy _____ you have been dreaming of, if you don’t lose heart.
| A．as a convenient life as | B．as convenient a life as |
| C．as a life convenient as | D．convenient as a life as |
If _______ in class, you will have to clean the classroom for a week as a punishment.
| A．caught sleeping | B．caught to be sleeping |
| C．catching sleeping | D．to catch to sleep |
After a day’s hard labor on the farm, my parents came home late, ________.
| A．being exhausted | B．exhausted |
| C．having exhausted | D．exhausting |