A.frighten
B.worry
C.dare
D.fear

A.frighten
B.worry
C.dare
D.fear

A.there are about five hundred types of plants
B.seventy species of mammals can be found there
C.it is home to about ninety species of birds
D.fewer than 100 reptiles are found there

A.confirm
B.calculate
C.formulate
D.participate

A.people
B.plants
C.animals
D.ecoregions

A.The Sahara Desert has no animals or plants.
B.It is the second largest desert.
C.It is in North Africa.
D.It is in the United States.

A.Location of the Sahara Desert.
B.Hot weather of the Sahara Desert.
C.How animals survive on this Desert.
D.The Sahara Desert and its ecosystem.

A.Location of the Sahara Desert.
B.Hot weather of the Sahara Desert.
C.How animals survive on this Desert.
D.The Sahara Desert and its ecosystem.

A.unlucky
B.strong
C.tough
D.demanding

A.remain
B.leave
C.stop
D.start