Many people worry that air pollution might changes in the weather around the world.
| A．add to | B．lead to | C．turn to | D．belong to |
He told us whether _________ a picnic was still under discussion
| A．to have | B．having | C．have | D．had |
Practising Chinese kung fu can not only _____ one’s strength, but also develop one’s character.
| A．bring up | B．take up | C．build up | D．pull up |
—May I open the window to let in some fresh air?
—___________
| A．Come on | B．Take care | C．Go ahead! | D．Hold on! |
John is very ____ ——if he promises to do something he’ll do it .
| A．independent | B．confident | C．reliable | D．flexible |
This printer is of good quality. If it _______ break down within the first year, we would repair it at our expense.
| A．would | B．should | C．could | D．might |