(1)Mei Mei has covered he[=her] face with her hands.正确
(2) Mei Mei covered her face with her hands.正确
(3) Mei Mei had covered her face with her hands.正确
注:hands=使用复数
(1)Mei Mei has covered he[=her] face with her hands.正确
(2) Mei Mei covered her face with her hands.正确
(3) Mei Mei had covered her face with her hands.正确
注:hands=使用复数