They are at the moment working __ time to get everything ready for the conference.
A．against
B．in
C．on
D．ahead

The passage says "He digs for it." It is because ______.
A．his ticket is deep in mud
B．he loses his ticket
C．he forgets where his ticket is
D．it is hard to take out his ticket

The average speed of a ball hit by a Pingpang racquet （球拍) is the __ among all ball games.
A．lowest
B．highest
C．quickest
D．most full

It is reported that the police __ the case.
A．is looking on
B．are looking into
C．is looking after
D．are looking up

The passage mainly wants to tell us ______.
A．it is difficult for a commuter to go to work
B．we had better not go to work by train
C．it is necessary to improve the poor conditions on railway
D．both A and B

The best part of the book is those that use information from biology to tell us what actually happened in evolution．
A．这最精彩的部分是用生物学来阐述变革中所发生的事情。
B．这本书最好的部分是利用生物学告诉我们周围实际发生的有用的信息。
C．这本书最好的部分是使用生物学信息告诉我们进化中实际上发生的事情。
D．这本书最大的好处是从生物学的角度告诉我们一些有用的信息和变革中发生的事情。