—Could you please tell me_______?
—Sorry, you can turn to Mr. Lee for help.
| A．how long can man live without water |
| B．how long could man live without water |
| C．how long man can live without water |
| D．how long man could live without water |
My sister is only two years old, and I have to _____ her on Sunday.
A. look forB. look after
C. look like D look at
—What are you doing for your vacation?
—________________________.
| A．I’m going hiking. |
| B．I went to the beach. |
| C．I often go to the mountain. |
| D．I like going bike riding. |
—I’m tired and stressed out.
—You should ___________.
| A．study hard | B．go to the dentist |
| C．listen to light music | D．stay out late |
—_________is very interesting to swim in the river in summer,but it’s dangerous.
| A．This | B．That | C．It | D．He |
Vegetables are good our health, so we should eat them every day.
| A．at | B．for | C．in | D．with |