I remembered having locked the door, but I came back to .
| A．take off | B．put up |
| C．make sure | D．used to |
31. _____his being late again,he lost his job and had to stay at home.
| A．Owe to | B．As result of | C．In case of | D．Because |
30.We don’t allow____here,but we can allow you ____in the next room.
| A．smoking,smoke | B．smoke,smoking | C．smoking,to smoke | D．smoke,to smoke |
29.They look forward____a chance to receive further education.
| A．of getting | B．in getting | C．to get | D．to getting |
28.It’s reported that the United States____energy as the whole of Europe.
| A．as twice | B．twice much | C．twice much as | D．twice as much |
27.That was such an____question that it made me____,not knowing how to answer.
| A．embarrasing,embarrassed | B．embarrassed, embarrassed |
| C．embarrasing, embarrasing | D．embarrassed,embarrasing |