Flu is a very ______ infectious disease.
题型:选择题
问题:
Flu is a very ______ infectious disease. Fever, headaches, coughing and fatigue are some of its ______ symptoms.
A.normal; common
B.usual; ordinary
C.common; usual
D.ordinary; normal
Flu is a very ______ infectious disease. Fever, headaches, coughing and fatigue are some of its ______ symptoms.
A.normal; common
B.usual; ordinary
C.common; usual
D.ordinary; normal