教学方法一旦形成之后,不会随着社会的变革而发生变化。
参考答案:错
玄武岩风景地貌主要分布在()。
A.湛江硇洲岛
B.新疆的天池
C.黑龙江五大连池
D.峨眉山顶
E.吉林长白山
When he _______ the door, he found his keys were nowhere.
A.would open
B.opened
C.had opened
D.was to open