下图所示的实验或操作中，能达到实验目的的是（ ）
| A．图①常用于分离沸点不同且彼此互溶的液态混合物 |
| B．图②可用于实验室制备并收集少量的NH3 |
| C．图③表示的是实验室闻氯气气味的方法 |
| D．图④可用于除去SO2中的HCl气体 |
I can’t leave. She told me that I ______ stay here until she comes back.
| A．can | B．must | C．will | D．may |
—— Do you mind my opening the window? It’s a bit hot in here.
—— ______ , as a matter of fact
| A．Go ahead | B．Yes, my pleasure |
C．Yes, I do | D．Come on |
It’s high time you had your hair cut ; it’s getting _______ . 
| A．too much long | B．much too long |
C．long too much | D．too long much |
My friend showed me round the town, ______ was very kind of him. 
| A．which | B．that | C．where | D．it |
They use computers to keep the traffic _______ smoothly.
| A．being run | B．run | C．to run | D．running |