关于水玻璃的性质和用途的叙述正确的是
| A．它是一种矿物胶，既不能燃烧，也不受腐蚀 |
| B．在建筑工业中可作黏合剂 |
| C．木材、织物浸过水玻璃后，具有防腐性能且不易燃烧 |
| D．水玻璃的化学性质稳定，在空气中不易变质 |
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 |
Jenny nearly missed the flight______ doing too much shopping.
| A．as a result of | B．on top of | C．in front of | D．in need of |