– Why does she look so tired?
-- She ________ all the morning and she still hasn’t finished it.
| A．cleaned | B．was cleaning | C．has been cleaning | D．has cleaned |
Many people have fully realized it's important to keep __________ balance of __________ nature. Otherwise, humans will be punished by it.
| A．a; the | B．the; the |
| C．the; / | D．/; / |
He lost his __________ and fell off his bicycle.
| A．balance | B．strength |
| C．power | D．way |
—Do you need any help, Lucy?
—Yes. The job is __________ I could do myself.
| A．less than | B．more than |
| C．no more than | D．not more than |
Mr. Black is very happy because the clothes made in his factory have never been __________.
| A．popular | B．more popular |
| C．most popular | D．the most popular |
The report indicates that the new power station produces __________ energy as the one built earlier.
| A．twice much | B．as twice |
| C．twice much as | D．twice as much |