The annual Energy & Environment Conference calls on our human beings to _______environmental issues.
| A．care for | B．care of | C．care about | D．care in |
A huge _____ of quilts was needed in Qinghai province since it was freezing at night.
| A．number | B．plenty | C．quantity | D．quality |
. _____ can be enjoyed until you have a deep understanding of the low-carbon lifestyle.
| A．Something | B．Nothing | C．Few | D．Much |
If you _____ the meeting place in greater detail, I _____ so much time looking for it.
| A．described; wouldn’t waste | B．had described; wouldn’t have wasted |
| C．would have described; had wasted | D．described; wasted |
He turns a deaf ear to his parents, _____ many times they have pointed out his weakness.
| A．whatever | B．whichever | C．whenever | D．however |
. Mage is rather difficult to make friends with, but her friendship, _____ is truer than any other.
| A．once gained | B．when to gain | C．after gained | D．while gaining |