cross, across和throughCroSsScross作为动词用时，意思是“穿过，跨过”，如过马路，过河等。当作名词用时，意思是“十字架，十字形饰物”Be carefulwhen,you Cross the street.Cross the bridge, and you will see a bigbuilding. acrosSs。across是介词，意思是“跨过，穿过”，主要表示从物体的表面上穿过。*。The Great Green Wall is across thenorthwestof China: through。 through是介词， 意思是“从.通过，穿过”，主要表示从物体内部窗过。The two friends were talking through theforest.。He got intothe room through the backdoor,*。through*。thought think过去式。though尽管 buy-boughtbring-brought*。The post office is justA. overB. throughC. acrossD. crossCthe street.-Excuse me, wheres the museum? Is it_B_the library?-Yes, they are opposite to each other.A. next toB. across fromC.in front ofD.in the front offyou_D_ the street, youll get there.A. overB. throughC. acrossD. crossAuntie Jane has walked _C_ the wheatfield for home.A. overB.throughC. acrossD. crossPdliketotrek _B thejungle.A. overB. throughC. acrossD. cross。The river is too wide to swim C。A. over。B. through。C. acroSss。D. cross