

c) dreams can be both enjoyable and disagreeable

a) people dream every night

d) can reflect our recent experience

a) show

c) nobody can tell for sure what causes dreams
______________________________________________________________________________________



c) the person you play jokes on

b) silly but harmless

a) trick

d) / April fools’ were people who celebrated New Year’s Day according to the old calendar

b) like people who perform them
_____________________________________________________________________________________

b) dolphins entertain visitors

c) dolphins are taught to do trick due to their natural abilities

b) have well-developed brains

c) creatures fed on milk

c) may be trained to communicate with people