下列图中不能正确反映其对应操作的是(    )

A	B	C	D
在一定量的AgNO3溶液中逐滴加入NaCl溶液	等质量的Zn和Mg分别与足量稀H2SO4反应	向NaOH溶液中逐滴加入稀HCl	等质量CaCO3分别与足量稀HCl反应

Maria can't go to school because she is ____ (ill).

There is some orange            in the bottle.

用动词的适当形式填空。
⑴In class, every student in our class ____  (take) notes carefully
⑵–Do you think whether the book called Harry Porter is worth ____  (read)?  - Yes, of course.
⑶ I called you yesterday afternoon, but you were out. - Oh, I ____ (watch) a football match on the playground.
⑷ Can you hear the two boys ____  (argue) with each other right now?
⑸The person we talked about ____  (visit) our school next week..

下列原子结构示意图中，表示非金属元素的是（   ）