Why ____it get colder when we go up a mountain ?We are getting nearer to the sun !
| A．ought to | B．would | C．should | D． must |
When the spaceship traveled above,________new-looking earth appeared before us, _______
earth that we had never seen before.
| A．a; the | B．the; an | C．/; the | D．a; an |
---I really don’t know how to thank you enough.
---___________ .
| A．No problem. | B．Think nothing of it. |
| C．With pleasure. | D．Glad to hear that. |
Mr. Johnson always carries a notebook, in which he_________everything that happens.
| A．sets down | B．settles down | C．comes down | D．breaks down |
--- Hi, Tracy, you look tired.
--- I’m tired. I ______ the living room all day.
| A．painted | B．had painted | C．have been painting | D．have pained |
Large quantities of fish _______ in the river in the past few days.
| A．were caught | B．was caught | C．has been caught | D．have been caught |