Recently people have made great progress in using ____ power of nature to produce____ electricity.
| A．a; the | B．/; / | C．the; / | D．a; an |
—Are you worried about his safety?
—Only .
| A．faithfully. | B．broadly | C．slightly | D．extremely |
Although he is old, he’s very . However, when he was young, he was very lazy.
| A．peaceful | B．willing | C．stubborn | D．active |
—What is the model plane like?
－Well, the wings 
of the plane are of its body.
| A．more than the length twice | B．twice more than the length |
| C．more than twice the length | D．more twice than the length |
All cars made nowadays are with safety belts.
| A．prepared | B．packed | C．built in | D．equipped |
Before going abroad, he devoted all the time he could his spoken English
| A．to improve | B．to improving | C．improve |
D．improving |