下列化学反应方程式或离子方程式书写正确的是
| A．乙烯制溴乙烷： CH2CH2 + Br2 → CH2BrCH2Br |
B．乙醇催化氧化：2CH3CH2OH + O2 2CH3COH + 2H2O |
C．苯与氢气加成： |
| D．从海带中提取碘：H2O2 + 2I- + 2H+ = I2 + 2H2O |
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 |
What I need is_____ book that contains ______ABC of oil painting.
| A．a; 不填 | B．the; 不填 | C．the; an | D．a ; the |