The boss ______ the worker how to do it, or the accident couldn’t have happened.
| A．can’t have told | B．ought to tell | C．could have told | D．mustn’t have told |
He is wearing sunglasses to protect his eyes ___ the strong sunlight.
| A．by | B．from | C．to | D．in |
____ you first met Tom.
| A． where was it that | B．that was it where |
| C．where it was that | D．that was it where |
The tower of London is ___ the church tower.
A．twice high tha n |
B．two times as high as |
| C．twice higher as | D．three times the height of |
There is no doubt ______he will come to our party.
| A．that | B．if | C．whether | D．what |
A: --- Are you coming to Jim’s birthday party ?
B: --- I’m not sure. I ________ go to the concert instead.
| A．should | B．would | C．must | D．might |