Ⅵ. 动词时态填空（每题1分,共10小题）
86. He usually likes to listen to the radio, but now he __________（watch）TV.
87. ---Have you ever come here before?
---No, it is the first time that I ___________（come）to this city.
88. _____________（ follow）your doctor’s advice, or your cough will get worse.
89. While_______（wait）, I read newspapers.
