I have found no convincing as to the truth of the accident, so I have to reserve my judgment for the moment.
| A．balance | B．appearance |
| C．evidence | D．intelligence |
—sss，you haven't been acting like yourself．Everything is OK?
—.
| A．Sure, it is | B．I'm fine，thanks | C．That's good | D．It's a pleasure |
I am _____ about what I say because careless remarks are likely to hurt others' feelings．
| A．enthusiastic | B．concerned | C．doubtful | D．cautious |
Apple's iphone4S disappointed its fans，its later success was beyond what people could expect．
| A．When | B．As | C．Unless | D．While |
With the nuclear crisis worsening in Iran, the world's attention is fixed again onis called the Middle East．
| A．which | B．that | C．what | D．it |
William found it increasingly difficult to read，for his eyesight was beginning to．
| A．disappear | B．fall | C．fail | D．damage |