―Why are you so happy?
―Because the news _____ too exciting.
| A．are | B．have | C．is | D．has |
Many more trees should ____ this year.
| A．plant | B．be planted | C．planted | D．be plant |
—____ the workers are very tired, ____they keep on working.
— They are great. We must learn from them.
| A．Because; / | B．Though; / |
| C．Because; so | D．Though; but |
If Tony_____ to the corner this weekend, Bob will join him.
| A．has gone | B．are going | C．goes | D．went |
Her husband is a great cook. So she can enjoy _____ food every day.
| A．tasting | B．cooking | C．tasty | D．to cook |
—Would you mind opening the window?
—____. Look at the heavy haze (霾) outside.
| A．Yes, of course | B．Not at all |
| C．We'd better not | D．No problem |