It was perfectly all right，he said，because the police ________him of anything.
| A．hadn't suspected | B．hasn't suspected |
| C．will suspect | D．didn't suspect |
. While he was investigating ways to improve the telescope, Newton made discovery which completely changed man’s understanding of color.
| A．a; / | B．a; the | C．/; the | D．the; a |
. The breakdown of the machine brought the work into a mess.
| A．relevant | B．academic | C．abrupt | D．absurd |
Hangzhou is distinguished its beautiful scenery.
| A．as | B．for | C．in | D．by |
. Don’t let yourself be by a small failure in the experiment Try again.
| A．turned down | B．cast down | C．put down | D．made down |
______________food are needed.
| A．Quantities of | B．Mass of | C．A large amount of | D．Lots of |