Part Ⅱ　Learning about Language, Using Language
课前预习识记 (学生用书P49)Ⅰ.识记单词1．t________n. rise and fall of the sea that happens twice a day 答案：tide2．n________n. cloth of threads that are knotted together with big holes between答案：net
3．c________n. very small part of a human, animal, or plant body答案：cell4．s________n. furry animal that lives in the sea and on the land 答案：seal5．s________v. pull liquid into your mouth through your lips答案：suck