A.continue
B.physics
C.split
D.like

A.interesting
B.satisfy
C.afternoon
D.conclusion

A.repeat
B.frequency
C.occasionally
D.immediately

A.was
B.had
C.were
D.had been

A.many
B.plenty of
C.a lot 
D.number of

A.die 
B.dead                       
C.death
D.deaden

A.take off
B.panic
C.pilot
D.airport

A.plough
B.harrow
C.boil water
D.pump water

A.chicken
B.buffalo
C.cow
D.ox

A.chemistry
B.history
C.biology
D.library