（2013·安徽卷)From space, the earth looks blue. This is about seventy-one percent of its surface is covered by water.
| A．why | B．how | C．because | D．whether |
Sorry, Madam. You’d better come tomorrow because it’s ________________ the visiting hours.
| A．during | B．at | C．beyond | D．before |
When he turned professional at the age of 11, Mike ___________ to become a world champion by his coach and parents.
| A．expected | B．was expecting | C．was expected | D．would be expected |
The company had about 20 notebook computers but only one-third ___________ used regularly. Now we have 60 working all day long.
| A．is | B．are | C．was | D．were |
Research ______________ out at Liverpool University supports this idea and suggests that if we don’t use the sense of direction, we lose it.
| A．not carry | B．carrying | C．being carried | D．having carried |
A communicative satellite ________________ as much as 3.5 tons was sent up into space last week.
A. weighingB. weighedC, to be weighed D. being weighed