west no By bike How far good |
A.We should keep the air clean and fresh. | B.You need water. |
C.You should save every drop of water. |
A.saves | B.save | C.saving |
A.We should do exercise every day. |
B.We should eat fruit every day. |
A.drinks | B.drink | C.drinking |
A.need | B.needs | C.should need |