双基限时练(十八) unit 6 grammar 1 ⅰ.单句语法填空(不多于3个单词) 1.i can hear the cars ________ night. 答案 at 2.there is a bridge ________ the river. 答案 over 3.there is a cat ________ the table. 答案 under 4.my house is just ________ the street, so we are neighbours. 答案 across