I never doubt ________ he was dedicated to our firm.
| A．that | B．whether | C．if | D．what |
No sooner ________in the distance ______a storm began to pour.
| A．a thunder broke; when | B．a thunder had broken; than |
| C．had a thunder broken; than | D．did a thunder break; than |
The CDs are on sale！Buy one and you get ______ completely free.
| A．other | B．others | C．one | D．ones |
It’s no use____ that you didn’t know the rules.
| A．you pretend | B．you to pretend | C．of you to pretend | D．your pretending |
. At a rough estimate（估计）, Nigeria is ____ Great Britain.
| A．three times the size as | B．the size three times of |
| C．three times the size of | D．three times as the size of |
. In face of _______ failure, it is the most important to keep up ________ good state of mind.
| A．不填; a | B．a; 不填 | C．the; 不填 | D．不填; the |