B. Listen. Circle T for True of F for False.
(Nghe. Khoanh tròn T cho Đúng của F cho Sai)
1. Hayes started studying frogs when he was a young boy. T F
2. The male frogs changed color because of water pollution. T F
3. The water was dangerous for frogs, but it was safe for humans. T F
4. Watching these frogs regularly can save human lives. T F
Bài Làm:
1. Hayes started studying frogs when he was a young boy. FALSE
2. The male frogs changed color because of water pollution. TRUE
3. The water was dangerous for frogs, but it was safe for humans. FALSE
4. Watching these frogs regularly can save human lives. FALSE