What does the author say about beach pea and bayberry?
A.They have become commercially important plant.
B.They were once an important food crop for early settlers.
C.They grow on dunes after marram grass is established.
D.They are spreading across the Island, destroying important crops.

______ (51)
A.herds
B.flocks
C.bunches
D.packs

The word “trampled” can be replaced by
A.flooded
B.stepped on
C.burned
D.ripped up

______ (52)
A.During
B.When
C.Not until
D.Meanwhile

___________ (61)
A.inhabited
B.attended
C.crowded
D.visited

___________ (63)
A.round
B.pitch
C.course
D.court

___________ (65)
A.remaining
B.resting
C.upholding
D.leaving

___________ (66)
A.that
B.which
C.whose
D.what

___________ (68)
A.varying
B.unsteady
C.unsettled
D.altering

What is the main subject of the passage?
A.The effects of cloud seeding
B.The process by which snow crystals form
C.Developments in methods of increasing precipitation
D.The scientific contributions of Vincent Schaefer