If we keep wasting so much energy, _____are that our oil wells will dry up and the environment will be destroyed.
| A．problems | B．difficulties | C．questions | D．chances |
32. _____in charge of the shopping center, Bob had to read magazines to kill time.
| A．Having left | B．Being left | C．To leave | D．Left |
31. It is on the maglev train that is very comfortable _____ I have been to the People’s Square.
| A．that | B．how | C．where | D．When |
30. The price _____ should have made you realize it was a trick.
| A．alone | B．just | C．simple | D．Only |
29. They made many records, _____ they will always be remembered.
| A．for that | B．to which | C．for which | D．to that |
28. The thief _____computers _____ $20000.
A. got away with; worthB. got away for; worthy
C. away with; worth C.got away; worthy of