we must ask people not to cyt down trees now.保持句意不变

we must ask people not to cyt down trees now.保持句意不变 we must we must ask people not to cyt down trees now.保持句意不变 we must ask people not to cut down trees =we must -----peopl We muse stop cutting down trees.保持句意不变,We___ _____ cutting d 1.we must go home now.It's getting dark.（保持句意不变） People must down the trees we must stop talking 保持句意不变 We can go to the People's Square by underground(保持句意不变） We are not allowed to take photos in the museum.(保持句意不变） 2.we must keep animals from cruelty (保持句意不变) we must _____an We must not leave rubbish in the park.(保持原句意思不变） ____ _____ We need air to survive.（保持句意不变）