7. Do you know the ______ answer ______ the question?

A. accurate, of　　　 B. accurately, to　　 C. accurately, of　　　　 D. accurate, to

6. ______ her help, I finish my homework in time.

A. for　　　　　　　　　 B. with　　　　　　　　 C. in　　　　　　　　　　　　 D. on

5. It ______ the computer thirty seconds to finish ______.

A. took, calculating　 　　　　　　　　　　　　 B. took, to calculate

C. spent, calculating　　　　　　　　　　　　　 D. spent, to calculate

4. We are all ______ at the _____ news

A. amazing, amazing　　　　　　　　　　　　 B. amazed, amazed

C. amazed, amazing　　　　　　　　　　　　　 D. amazing, amazed

3. Is a human brain a more powerful _____ than a computer?

A. calculator　　　　　 B. calculate　　　　　 C. calculating　　　　　　 D. calculation

2. Five times zero equals ______.

A. five　　　　　　　　　 B. ten　　　　　　　　　 C. fifty　　　　　　　　　　 D. zero

1. The system of numbers that nearly everyone use today ______ the numbers from 1 to 9 and 0.

A. are　　　　　　　　　 B. consist of 　　　 C. is　　　　　　　　　　　　 D. consists of

5. She is at _____ 50 years old.(little)

4. The abacus is one of the first ______ machine which is fast and accurate.(calaulate)

3. Do you think the brain is a _____ computer?(live)