遗迹，遗体 N3
存在 N 4
进化；演变 N5
暴露，显露 N 6
促成，做贡献 V 7
投标，努力，争取 N 9
歧视 N 10
许诺做某事；同意做某事 V 11
每年的 adj
极端的 adj
使 陷入困境 V14
商业的 adj
促进，增进；促销，宣传；晋升 V16
艰难的，艰巨的 adj
轻便的，便携的 adj
不正常的，反常的 adj
阻止；打消 V20
紧急情况；突发事件 n21
可靠性 N22
至关重要23
使某人想起24
作为回报25
经历（困难，痛苦等）；仔细检查；顺利完成26
进入，到达27
preserve2
prehistoric3
awareness5
catastrophe7
estimate8
marvelous9
monument10
compromise11
subjective12
thorough13
guidance14
diplomacy15
rainfall16
nuclear17
radioactive18
magnetic19
isolated20
ecology21
obscure22
fragile1
“Do you have some letters ____
” the secretary asked her manager
A to type B typedC type D to be typed2
He ____ football regularly for many years when he was young
A was playing B playedC has played D had pla
