Look at pages 27 and 46 again, then fill in the blanks with 3 different words: “Although, however, but” (Xem lại trang 27 và 46, sau đó điền vào chỗ trống 3 từ khác nhau: “Although, however, but”) 1. We use fossil fuels in our daily life, … they are limited and cause pollution. 2. We use fossil fuels in our daily life; …, they are limited and cause pollution. 3. … we use fossil fuels in our daily life, they are limited and cause pollution.