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 |
_____ in a heavy rain, the teacher fell ill and couldn’t but ______ for a leave.
| A．Caught; to ask | B．Catching; ask | C．Catching; to ask | D．Caught; ask |
Mr. Richard hasn’t got any time to play golf these days, because he is ______ in the research of bird language.
| A．devoted | B．concentrated | C．buried | D．spared |
When the newspaper boy got to a blue door, __________, which frightened him away as fast as possible.
| A．out a fierce dog rushed | B．out did a fierce dog rush |
| C．out rushed a fierce dog | D．rushed out a fierce dog |
When the clock_________ twelve, all the lights went out.
| A．hit | B．beat | C．struck | D．knocked |
The man pulled out a gold watch, ______ were made of small diamonds.
| A．the hands of whom | B．whom the hands of |
| C．which the hands of | D．the hands of which |