【2012青海西宁】________ trees will be planted on that mountain next spring
—TV and computer are so popular these days. —Yes, they can______ our eyes to the outside world.
______ to improve our environment?
Did your father tell you ______?
“Great achievements can be done in _______ with nature, ” Schworer said.
— ______is it from your home to the Summer Palace? — It takes about 20 minutes to go there by car.