— We would appreciate it if you could stay for lunch.
— Sorry, I . I have another appointment.
| A．won’t | B．shan’t | C．can’t | D．mustn’t |
David apologized for _______to inform me of the change in the plan.
| A．his being not able | B．him not to be able |
| C．his not being able | D．him to be not able |
Jackson returned to Seattle for a while, ______ to Canada, and worked a few jobs there before heading for New York .
| A．moving | B．moved | C．being moved | D．having moved |
We were swimming in the lake _____ suddenly the storm started.
| A．when | B．while | C．until | D．before |
That is the only way we can imagine _______ the overuse of water in students’ bathrooms.
| A．reducing | B．to reduce | C．reduced | D．reduce |
Some 200 people were reported ______ in the earthquake which happened in Sichuan last month.
| A．were killed | B．to be killed | C．killing | D．to have been killed |