读句子，回答问题。

1．他们像一群魔鬼似的，把我们包围起来。 

     这句话中把____ 比作             。 

2．这个力量就是他平日对我们讲的——他对于革命事业的信心。   

     句中破折号的作用是：                                                           

33. You can, __________ the sky is clear, see as far as the old temple on top of the mountain, but not today.  

A．when

B．where

C．though

D．Because