下列实验操作能够达到实验目的的是（ ）
| A．实验室采用图①所示装置收集SO2 |
| B．可用图②所示装置比较KMnO4、Cl2、S的氧化性强弱 |
| C．实验室制取的溴乙烷中常含有少量溴，加适量的苯，振荡、静置后分液，可除去溴乙烷中的溴 |
| D．称取0.40 g NaOH，置于100 mL容量瓶中加水至刻度线，可配制0.10 mol/L NaOH溶液 |
It is often ______ that human beings are naturally equipped to speak.
| A．said | B．to say | C．saying | D．being said |
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 |