John as well as his good friends often skating in winter．
| A．is going | B．go | C．goes | D．are going |
— How long do you suppose it is ______ he arrived here？
— No more than half a week.
| A．when | B．before | C．after | D．since |
— Could you meet me at the airport?
— I'd like to，but I'm afraid I ______ a very important meeting when you return.
| A．am attending | B．was attending |
| C．will be attending | D．will have attended |
Experts warn that global warming will cause extreme climate changes including more______floods, heat waves and droughts.
| A．usual | B．ordinary | C．frequent | D．common |
Premier Wen’s three-day visit to Japan, ______ as the “ice-melt” trip, has a positive effect on Sino-Japanese relationship.
| A．being intended | B．intended |
| C．to intend | D．having intended |
The Greens’ shop has been broken into three times in the last two years, ______ resulting in their great loss.
| A．each | B．ever | C．any | D．either |