8.Her behavior is extremely childish.
A） simple
B） immature
C） beautiful
D） foolish
9.We also want to use the water to irrigate barren desert land.
A） hairless
B） bare
C） empty
D） bald
10.The steadily rising cost of labor on the waterfront has greatly increased the cost of shipping cargo by water.
A） continuously
B） quickly
C） excessively
D） exceptionally
11.Hundreds of years ago cloves were used to remedy headaches.
A） disrupt
B） diagnose
C） evaporate
D） cure
12.John Hanson helped draft instructions for Marylands delegates to the Stamp Act Congress.
A） clarify
B） formulate
C） revise
D） contribute
13.Practically all species of animals communicate either through sounds or through a large repertory of soundless codes.
A） Simultaneously
B） Almost
C） absolutely
D） Basically