—— I can’t get through to the general manager’s office anyhow.
—— The line is busy. Someone＿＿＿＿＿the telephone.
| A．must use | B．uses | C．must have been using | D．must be using |
Lucy was so excited _______she received an invitation from her friend to visit Beijing.
| A．where | B．that | C．why | D．when |
___ by thick bamboo and high forest, the ancient city hadn’t been discovered until the 1990s.
| A．Surrounding | B．Surround | C．Surrounded | D．Having surrounded |
The saying “Brother is smoking is not a cigarette(香烟), but loneliness.” is popular on the Internet.
| A．That | B．What | C．Whether | D．Which |
—Where is the shooting centre?
—It is about 50 kilometres ______ the city of Beijing.
| A．in south of | B．south of | C．the south of | D．southern of |
Though iPhone 4 is such a hit product, I won’t buy one unless its after service ______.
| A．was improved | B．gets improved | C．is improving | D．had got improved |