Trees are good for human being. We can’t plant them __________ many.
| A．so | B．such | C．too | D．enough |
People have realized that they should go on _____ balanced diet and do _____ exercise every day.
| A．a; / | B．the; an | C．the; the | D．/; an |
________ your next high-adventure trip is scheduled, start preparing now.
| A．In case | B．Unless | C．Only if | D．Whenever |
Your ideas are very interesting, but we need suggestions to get us out of the mess.
| A．impressive | B．similar | C．practical | D．traditional |
Donald doesn’t have much patience — he often loses his _______.
| A．courage | B．mind | C．balance | D．temper |
I ________ to the lecture this afternoon, but I ________ a bit ill.
| A．should have gone; was | B．would have gone; had been |
| C．should go; was | D．would go; had been |