— Did you have a good rest last night?
— Yes. I slept right ____ the thunderstorm.
| A．on | B．in | C．at | D．through |
Many countries are in great need of natural gas, wind and other forms of ________.
| A．power | B．source | C．energy | D．material |
Good heavens! There you are! We were all ________ about your safety. We were expecting you to come back much earlier all through the night.
| A．curious | B．concerned |
| C．upset | D．interested |
________you eat the correct foods ________ be able to keep fit and stay healthy.
| A．Only if; will you | B．Only if; you will |
| C．Unless; will you | D．Unless; you will |
—He says that my new car is a ________ of money.
—Don't you think those words are just sour grapes?
| A．lack | B．load | C．question | D．waste |
Nobody can deny that a fine house is a ________ of status and wealth.
| A．symbol | B．resource | C．sign | D．force |