The heavy storm damaged a lot of fruit trees.The fruit prices have _______ immediately.
| A．added | B．developed |
| C．jumped | D．dropped |
Having finished the work,_____.
| A．it was almost six o'clock | |
| B．a postman came and delivered the evening paper and some letters | |
| C．supper had been already prepared | D．we had a rest and then had supper |
The boy had his leg _____ while ____ football.
| A．broken, playing | B．break, play | C．broken, played | D．broke, was playing |
He would rather ______ his parents with their housework than _____ out to play games.
| A．to help, to go | B．help, go | C．help, to go | D．to help, go |
_____ carelessly, the boy made mistakes here and there. .
| A．being written | B．Wrote | C．Write | D．Writing |
The problem requires ______.
| A．studying with great care | B．to study carefully |
| C．to be studied without carelessness | D．taking great care of studying it |