The reason was _____ I was busy with my work at that time.
| A．why | B．because of | C．that | D．what |
The gas tank____________ twenty gallons of gas, but now it may____________ only three gallons.
| A．holds; contain | B．holds; be contained |
| C．is held; contain | D．is held; be contained |
--The two pairs of shoes are __________ the same colour.
--But they are different __________ colour.
| A．of; from | B．of; in | C．in; from | D．in; in |
Mr. Smith__________ the roll of film as soon as he arrived home
| A．got down to wash | B．got down to develop |
| C．got down to washing | D．got down to developing |
The shop manager always says to his assistants, "We can never be______customers.
| A．so | B．too | C．that | D．more |
Why didn't you tell me there was no meeting today? I______ all the way here through the heavy snow.
| A．needn't have driven | B．can't have driven |
| C．mustn't have driven | D．shouldn't have driven |