Directions: Beneath each of the following sentences there are four choices marked A, B, C and D. Choose the one answer that best completes the sentence.
The wild flowers looked like a soft orange blanket the desert.
A. covering B. covered C. cover D. to cover
That year his total income, with his reward __________12，000 yuan.
| A．added up to |
| B．added to |
| C．added |
| D．adds up to |
Nowadays searching information on the Internet is a piece of cake. The __________ is how you can tell if the information you get is beneficial or not.
| A．characteristic |
| B．competition |
| C．challenge |
| D．confusion |
- No wonder you caught a cold. You __________ out last night without a coat.
-I know how silly I was.
| A．shouldn't have gone |
| B．mustn't have gone |
| C．couldn't have gone |
| D．mightn't have gone |
Luckily, we'd brought a road map without which we __________ our way.
| A．would have lost |
| B．should have lost |
| C．will have lost |
| D．needn't have lost |
The lake is __________ with fish.
What a beautiful scene ！
| A．living |
| B．alive |
| C．live |
| D．lively |