our earth, or else it will be no longer fit for us to live on.A．ProtectedB．

题型：不详难度：来源：

our earth, or else it will be no longer fit for us to live on.

A．Protected	B．To protect
C．Protecting	D．Protect

答案

解析

试题分析：句意：保护我们的地球，否则它将不再适合我们生存。分析语境可知为祈使句+or+一般将来时结构。故选D。

举一反三

____ touch anything unless your teacher tells you to

A．No	B．Not
C．Not to	D．Don"t

题型：不详难度：| 查看答案

Although he is wise and intelligent, he fails to be elected as the manager. After all, ________ men can
be masters.[     ]
A. not every
B. each
C. all
D. not all

题型：同步题难度：| 查看答案

"All hope was not lost. " means "__________."[     ]
A. There was no hope at all
B. Hope was everywhere
C. No hope was lost
D. Not all hope was lost

题型：期中题难度：| 查看答案

Greek is the birthplace of the Olympic Games; ________ the Olympic Torch is lighted there every time they are held. [ ]
A. where
B. which
C. from which
D. X

题型：同步题难度：| 查看答案

____ several times, but unfortunately, the boy still couldn’t smooth away the problem on his own.[ ]
A. Having been explained
B. The problem having been explained
C. The problem had been explained
D. Although the problem had been explained

题型：同步题难度：| 查看答案