It’s not _________ good idea to drive for four hours without _______ break.
| A．a; a | B．the;a | C．the;the | D．a;the |
It rained heavily in the south，serious flooding in several provinces.
| A．caused | B．having caused | C．causing | D．to cause |
I have a lot of readings _____ before the end of this term.
| A．completing | B．to complete | C．completed | D．being completed |
There were many talented actors out there just waiting ______.
A to discover B to be discovered C discovered D being discovered
The lady walked around the shops, _______ an eye out for bargains.
A keep B kept C keeping D to keep
So far nobody has claimed the money in the library.
| A．discovered | B．to be discovered | C．discovering | D．having discovered |