Without the ‘ greenhouse effect’, the earth ____ be about thirty-three degrees Celsius cooler than it is.
| A．should | B．would | C．will | D．must |
---- I drove to Zhuhai for the air show last week.
---- Is that the reason _______ you had a few days off?
| A．why | B．that | C．what | D．which |
Only by working hard your dream of becoming a doctor.
| A．you can achieve | B．can you achieve |
| C．can you be achieved | D．you can come true |
Although the working mother is very busy,she stilla lot of time to children.
| A．devotes | B．spends | C．offers | D．costs |
The doctor insisted that I _________ more fruit and vegetables.
| A．took | B．had taken | C．would take | D．take |
She told Tom ________ make the same mistake again.
| A．he can’t | B．don’t to | C．to not | D．not to |