b. They ______ swimming. They ____ collecting shells.
20/93
b. They ______ swimming.
They ____ collecting shells.
Giải thích
b. They aren’t swimming.
They are collecting shells.
b. Họ không phải đang bơi.
Họ đang nhặt vỏ sò.
20/93
b. They ______ swimming.
They ____ collecting shells.
b. They aren’t swimming.
They are collecting shells.
b. Họ không phải đang bơi.
Họ đang nhặt vỏ sò.