—I was on the point of crossing the road _______ the car accident happened.
—So you are a witness.
| A．where | B．when | C．that | D．which |
He used to ____his teaching when he was young.
| A．devote to | B．be devoted to | C．devoting to | D．being devoted to |
The guard____old man to pass after he showed him the pass.
| A．promised | B．agreed | C．let | D．permitted |
—What about _____concert?
—Coco Lee’s concert? To be honest, to buy ____ticket of hers is out of the question at the moment.
| A．the; the | B．a; a | C．a; the | D．the; a |
This cake is very sweet. You ______ a lot of sugar in it.
| A．should put | B．could have put | C．might put | D．must have put |
—Catherine, I have cleaned the room for you.
—Thanks. You _____it. I could manage it myself.
| A．needn’t do | B．needn’t have done |
| C．mustn’t do | D．shouldn’t have done |