网络信息良莠不齐，作为网络游客，我们应该 （ ）
①提高自己的抗诱惑能力
②提高自己的辨别觉察能力
③合理安排时间与精力
④加强修养，用丰富的知识充实头脑
| A．①②③ | B．②③④ | C．①③④ | D．①②④ |
________ he comes or not，the result will be the same.
| A．Even if | B．Whether | C．No matter | D．Although |
________ volleyball is her main focus，she's also great at basketball.(2011·北京)
| A．Since | B．Once | C．Unless | D．While |
________ hard you try，it is difficult to lose weight without cutting down the amount you eat.(2012·湖南)
| A．However | B．Whatever | C．Whichever | D．Whenever |
—Since you like the car so much，why not buy it?
—________，I can't afford it.
| A．As I like it much | B．Much as I like it |
| C．I like it as much | D．As much I like it |
The girl had hardly rung the bell ________ the door was opened suddenly，and her friend rushed out to greet her.
| A．before | B．until | C．as | D．since |