The sun ___ we get heat and light is the most important source of energy.
| A．that | B．which | C．from that | D．form which |
She has already tried her best and she is __________ for her job. Please don't be too __________ about it.
| A．responsibility; special | B．responsible; responsible |
| C．responsibly; unusual | D．responsible; particular |
He gave me some very __________ advice on buying a house.
| A．precious | B．worthy | C．precise | D．valuable |
It was necessary to __________ the factory building as the company was doing more and more business.
| A．extend | B．increase | C．lengthen | D．magnify |
Leaves are found on all kinds of trees, but they differ greatly __________ size and shape.
| A．on | B．from | C．by | D．in |
__________ what the six blind men said sounded! I can't help laughing!
| A．How foolishly | B．How foolish |
| C．What foolishly | D．What foolish |