Some people fear that ________ air pollution may bring about changes in _______ weather around the world.（）
| A． |
/; the |
B． |
the; / |
C． |
an; the |
D． |
the; a |
The habit is something that someone does repeatedly and often does not ________ because they have done it so many times before.
| A．know | B．understand |
| C．experience | D．realize |
Only ticketholders were ________ to the stadium for the concert given by Jay Chou, so many of his fans were turned away.
| A．allowed | B．permitted |
| C．agreed | D．admitted |
Hurricane Sandy's arrival and its effects ________ New York's offices being closed for three days.
| A．carried out | B．came up with |
| C．led to | D．caught up with |
The bush fire ________ fierce heat and the villagers nearby had to flee.
| A．set up | B．sent away |
| C．gave off | D．made out |
As the road to the airport is under reconstruction, we'd better ________ early to avoid the traffic jam.
| A．pay off | B．set off |
| C．put off | D．take off |