A good advertisement often uses words ________ people attach positive meanings.
| A．in which | B．to which | C．which | D．that |
【原创】 Green roofs have an ______effect, helping reduce the amount of energy______ to heat a building in winter and cool it in summer.
| A．isolated；needed | B．isolating；needed |
| C．isolated； needed | D．isolating；needing |
【原创】The hardest thing is to ______ less when you can ______more.
| A．get; take; | B．take; take; |
| C．take; get; | D．get; get; |
We need some more facts and figures we take the final decision.
| A．since | B．after | C．before | D．until |
Only you step into society can you learn practical things.
| A．while | B．that | C．when | D．as |
John returned with two laborers, with help we finally got the car out of the mud.
| A．their | B．whose | C．which | D．that |