Energy is _________ makes things work.

[    ] 　　

A. what  B. everything  C. something  D. that

__________ is a fact that English is being accepted as an international language.

[    ]　　 　　

A. There　　B. This　　 C. That　　 D. It

The native Americans used to depend ______ the bison _______ food.

[    ] 　　

A. on; on　　 B. on; for 　　 C. for; on　　D. for; for

_______ tall buildings, we can save room in big crowded cities.

[　　] 　　

A. By building　　B. Building 　　 C. To build　　 D. Build

_________ the solid rock on Manhattan Island it is safe to build very tall buildings there.

[    ] 　　

A. Since　　 B. As 　　 C. Because　　D. Because of

__________ the bison had a bad effect on the whole wildlife chain of the plains.

[　　] 　　

A. Kill　　　　 B. The killing 　　 C. Killing of　　D. Killing

___________ is very important.

[    ] 　　

A. Make good use of your time 　　

B. To make good use of your time 　　

C. To make good use your time 　　

D. Make good use your time

This is the hotel _______ last year.

[    ]

A. where we stayed  B. at which we stayed it

C. which we stayed  D. where we stayed at

This is just the place _________ we visited last year.

[    ] 　　

A. where　　B. that　　 C. when　　 D. why

__________ they managed to finish the work in such a short time remains a secret.

[    ]

A. That   B. When   C. How   D. What