What does the writer suggest when you feel you are losing your voice？
A. Rest your voice.
B. Drink some alcohol.
C. Ask a singer to teach you how to protect your voice.
D. Never go to see a doctor.
查看答案
Paragraph 4__________.
A. It is not beneficial for people to keep mentally active.
B. Intellectual activity can strengthen people's mental health regardless of their age.
C. Old people should engage in both mental and physical activities.
D. Old people only need to engage in physical activi-ties individually.
E. People with an active mind are more cognitively healthy in their old age.
F. Many experts are putting the theory to work in their own lives.
A．courseB．lengthC．timeD．state
A. course
B. length
C. time
D. state
It can be inferred from this passage that the feathers of a bird are colored
A. to frighten its enemies
B. to attract its enemies
C. to adjust its body heat
D. to match its environment
A．withB．toC．ofD．for
A. with
B. to
C. of
D. for
微信支付 
支付宝支付