-- Hello, Betty! What are you doing now?
-- I _______ on the Great Wall of China. I'll send them to you later.
A：will take pictures
B：am taking pictures
C：was taking pictures
D：take pictures
按要求完成下列填空：
（1）将AlCl3溶液加热蒸干并灼烧可得到____ （填化学式）．
（2）盛放纯碱溶液的试剂瓶不能用玻璃塞，是因为____ ．
（3）泡沫灭火器灭火时发生反应的离子方程式是____ ．
（4）常温下将0.01molCH3COONa和0.02molHCl溶于水，配成0.5L混合溶液．溶液中共有____ 种粒子，各离子浓度从大到小的顺序为 ____ ．
The Jurassic Park is _____ Steven Spielberg movie in which _____ hero fights bravely and protects his friends and family from dinosaurs.
