46、 The price of beerfrom 52 cents to$4 per liter during the summer season．
A．altered
B．ranged
C．separated
D．differed


47、 When I caught him__________ me I stopped buying things there and started dealing with another shop．
A．cheating
B．cheat
C．to cheat
D．to be cheating


48、 Many of the men have gone off to cities in search of higher pay，__________ women to carry on with the work．
A．only to leave
B．leaving
C．left
D．having left


49、 He looked through the pages of advertisements to find jobs__________ to college students during the summer holidays．
A．obtainable
B．available
C．convenient
D．symbols


50、 All the reference books should be made__________ to the teachers and students in our university．
A．concerned
B．available
C．related
D．flexible


51、 It is necessary that he__________ here tomorrow．
A．is
B．will be
C．be
D．would be


52、 The teacher__________the examination papers to the class．
A．scattered
B．contributed
C．spread
D．distributed


53、 No sooner had they got off the train__________ it started moving．
A．when
B．than
C．then
D．after


54、 The teacher spoke so fast that it was hard for the students to__________ what he was saying．
A．take in
B．take out
C．take up
D．take over


55、 This is not an economical way to get more water；__________ ，it is very expensive.
A．on the other hand
B．on the contrary
C．in short
D．or else