It is difficult for any of us to eat better, exercise more, and sleep enough,________ we know we should.
| A．because | B．even if | C．unless | D．before |
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 |
The children in some remote areas are looking forward ______ a chance to receive further education.
| A．for getting | B．to getting | C．to get | D．of getting |
A small car is big for family of three_______ you need more space for luggage.
| A．once | B．because | C．if | D．unless |