46.The rope ()( )when I pulled on it.

29.() money， she is quite rich. However this does not mean that she is happy.( )

28.She simply () that the check was good and did not ask him any question about it.( )

27.During the ()two decades， research has greatly expanded our knowledge about the sleep and dreams.( )

26.Despite his father＇s () objection， Darwin accepted the invitation to be a naturalist on H.M.S. Beagle during a long voyage of exploration.( )

25.He was afraid he would have to ()her invitation to the party.( )

24.Riding on a bus without paying the fare_ cheating the bus company.( )

23.It would be better to make a decision now， _leave it until next week.( )

22.Water encourages the () of iron and oxygen to form rust.( )

21.He often talks as if he()【be】my father.( )

20.Can you tell me ()about this city that makes people love it so much?( )