____ is known to everybody, the moon travels round the earth.
| A．As | B．It | C．When | D．Where |
Soon after getting off his horse, the captain appeared at the second storey windows, _________ he could see nothing but trees.
| A．which | B．from there | C．from where | D．there |
Having tried hard several times, they finally _______ the hope of finding an effective way to save the dying man.
| A．abandoned | B．released | C．discouraged | D．resigned |
For a moment nothing happened. Then _________ all shouting together.
| A．voices had come | B．came voices | C．voices would come | D．did voices come |
Children are ______ to meet with setbacks (挫折) as they grow up, so their parents don’t have to worry about it.
| A．possible | B．due | C．necessary | D．bound |
. You can’t see things clearly through a telescope unless it is ________ correctly to your sight.
| A．treated | B．adopted | C．adjusted | D．reminded |