[单选题] According to the passage, plants on the tundra grow in the ground__________.
A、to avoid being eaten by arctic animals
B、because fertilizer is not readily available
C、to minimize exposure to the cold
D、because unfrozen water supplies are very scarce
58[单选题]__________
A、A
B、B
C、C
D、D
E、E
II. Vocabulary and Structure ( 15 points)6[单选题] __________John Adams who in 1775 recommended George Washington to be commander in chief of the Continental Army.