To improve the quality of our products, we asked for suggestions had used the products.
A．whoever B．who C．whichever D．which
You park here! It’s an emergency exit.
A．wouldn’t B．needn’t C．couldn’t D．mustn’t
The palace caught fire three times in the last century, and little of the original building _______now.
A．remains B．is remained C．is remaining D．has been remained
If I had known about this computer program, a huge amount of time and energy .
A．would have been saved B．had been saved
C．will be saved D．was saved
— Her father is very rich.
—________ She wouldn’t accept his help even if it were offered.
A．What for? B．So what? C．No doubt． D．No wonder.
The experiment shows that proper amounts of exercise, if regularly, can improve our health．
A．being carried out B．carrying out C．carried out D．to carry out
