According to the passage, how do bats navigate?




A.By responding to the echoes of their signals bouncing off objects
B.By warning the colony of approaching danger with high squeaks
C.By beating their wings fifty times per minutes
D.By using their sensitive ears to hear the noises in the environment

This is the instance where big, obvious non-verbal signals are appropriate. A. B. C. D. matter




A.situation
B.attention
C.place
D.matter

Air pollution, together with littering, are causing many problems in our large, industrial cities today.




A.with littering
B.are causing
C.many problems
D.industrial cities

She the baby on the bed in order to change its nappy.




A.lay
B.laid
C.lied
D.lain

He traveled for 20 years and then he decided to return home.




A.farther away
B.farthest of all
C.safe and sound
D.far and wide

In order to avoid boredom, the most important thing is to keep oneself _.




A.occupation
B.occupational
C.occupant
D.occupied

_______where he tried to hide his favourite jacket, Mogie's brother always managed to find it.




A.Much as
B.However
C.Even though
D.No matter

A.inexperience
B.residential
C.expectedly
D.flexibility

You do it at night when you are tired




A.sleep
B.crash
C.Perfume
D.suitcase

A thing that you speak into




A.ice - cream
B.microphone
C.office
D.hotel