What he usually after class?[ ]
A. is; doing
B. does; does
C. do; does
D. does; do
答案:D
Before breakfast, he _________ his hands.
A. wash
B. washes
C. washs[ ]
艾滋病的三种主要传播途径是()
A.性接触、血源、母婴
B.性接触、母婴、产道感染
C.性接触、医源、产道感染
D.性接触、呼吸道感染、共用餐具