______yourself with positive people and you will keep focused on what you can do instead of what you can’t.
| A． Surrounding | B． Surrounded |
| C． Surround | D． Having surrounded |
Mary is proud a record by running two laps this year.
| A．to break | B．to have broken | C．breaking | D．having broken |
is more important isas the earth cooled down, water began to appear on its surface.
| A．What /that | B．That/what | C．What / what | D．That / that |
life will continue on the earth for millions of years to come will depend onthe problem of pollution can be solved.
| A．How /whether | B．That/that | C．Whether / if | D．Whether / whether |
The factLucy has been admitted into Lanzhou university made us excited.
| A．what | B．that | C．which | D．/ |
You and I could hardly work together, ______?
| A．could you | B．couldn’t I | C．couldn’t we | D．could we |