We will do everything we can____ our city.
| A．to save | B．save | C．saving | D．saved |
I’ll take you to the museum ______ you may see everything _________ you want.
| A．which; that | B．where; that |
| C．in which; which | D．where; what |
Is oxygen the only gas ________ helps fire burn?
| A．that | B．/ | C．what | D．it |
The number of the people present at the concert was _____ than expected. There were many tickets left.
| A．much smaller | B．much more |
| C．much larger | D．many more |
The silk road, _______ Marco entered China, was important for the exchange of goods and ideas.
| A．which | B．along which | C．after which | D．where |
—Would you please lend me some gas?
—Sorry, I have ________ it.
| A．use up | B．run out | C．gone out | D．run out of |