Question

【题目】如果你不认识单词，可以查词典。
If you don't know the words, you can in a .

Answer 1

【答案】look；them；up；dictionary
【解析】look sth up in the dictionary查词典，位于情态动词can后，故用动词原形，故为(1). look (2). them (3). up (4). dictionary。