实验小组探究盐酸和氢氧化钠反应过程中溶液pH的变化规律，得到如图所示曲线.下列有关该实验事实的说法正确的是
| A．该实验是将氢氧化钠溶液滴入盐酸中 |
| B．B点表示盐酸和氢氧化钠恰好完全反应 |
| C．A点时的溶液能使石蕊试液变红 |
| D．C点时，溶液中的溶质只有氯化钠 |
( ) That ____ nice.
A.sounding B.sound C.sounds
( ) There is a letter ___ you .Its ____ your brother .
A.to for B.for from C.to from
( ) ____ postcards is my hobby .
A.Collect B.Collecting C.collected
选择正确的答句。
（）（1）What are you doing?
（）（2）Have you got any stamps from China?
（）（3）Do you collect stamp?
（）（4）When do you get ?
| A．I get up at 6:00. |
| B．Yes, I do. |
| C．NO,I have not. |
| D．I’m dancing. |
( )Have you ___ a knife and fork?.
A. get B. getting C. got