—Where have you been, David? You're late for class again.
—________ My bus got caught in a traffic jam.
| A．Yes, so what? |
| B．Well, how come? |
| C．Sorry, but I couldn't help. |
| D．No, it's not my fault. |
The retired man donated most of his savings to the school damaged by the earthquake in Yushu，__________ the students to return to their classrooms.
| A．enabling | B．having enabled | C．to enable | D．to have enabled |
We had to wait half an hour __________ we had al-ready booked a table.
| A．since | B．although | C．until | D．before |
Our English teacher suggests that we should __________ the dictionary every time we come across a new word while reading.
| A．refers to | B．look up | C．not refer to | D．not look up |
—Hello, JinlingHotel. What can I do for you?
—Do you have a room __________ for this weekend?
| A．useful | B．available | C．possible | D．empty |
When I went to the lake, my father was__________ fishing.
| A．putting on | B．taking on | C．concentrating on | D．getting on |