在下列各句的空格内填上一个适当的完整的单词,该词的首字母已给。 小题1:In autumn the leaves of most trees turn y____ ____. 小题2:There’s no b____ ____ over the river. We have to cross it by boat. 小题3:It’s best to water plants either e____ ____ in the morning or late at night. 小题4:Many children like spending much money in b____ ____ beautiful pencil boxes. 小题5:Before you come into the room, please k ____ ____ at the door. story practice find notebook but