11. A deadly disease has affected these animals.
A. contagious
B. serious
C. fatal
D. worrying
12．With immense relief, I stopped running.
A. much
B. enormous
C. little
D. extensive
13. Contact your doctor if the cough persists.
A. insists
B. perseveres
C. continues
D. resists
14．Because of the popularity of the region, it is advisable to book hotels in advance.
A. possible
B. profitable
C. easy
D. wise
15． We also want to use the water to irrigate barren desert land.
A. hairless
B. bare
C. empty
D. bald