Mrs. Brown went to the doctor’s because she had some trouble_____ her heart.
| A．for |
| B．with |
| C．to |
| D．on |
Some steps have been taken to prevent the forest ____ .
| A．from destroying | B．to destroy |
| C．from being destroyed | D．to be destroyed |
The cleaning workers are on strike to make ____ they are doing an important and necessary job for society.
| A．it clear that | B．it clearly that | C．that clear | D．that clearly |
Every minute he could spare was made use ____ spoken English.
| A．of practising | B．of to practise | C．to practise | D．to practicing |
“How much do you ____ for repairing such a pair of shoes?”“Two dollars, sir.”
| A．charge | B．take | C．cost | D．spend |
“Is Jack on duty today?”“It ____ be him. It’s his turn tomorrow.”
| A．mustn’t | B．won’t | C．needn’t | D．can’t |