利用右图所示装置，当X、Y选用不同材料时，可将电解原理广泛应用于工业生
产。下列说法中正确的是
| A．氯碱工业中，X、Y均为石墨，Y附近能得到氢氧化钠 |
B．铜的精炼中，X是纯铜，Y是粗铜，Z是CuSO4 |
C．电镀工业中，X是待镀金属，Y是镀层金属 |
D．外加电流的阴极保护法中，Y是待保护金属 |
—— 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 |
If you leave the club, you will not be_____back in .
| A．received | B．admitted | C．turned | D．moved |