根据句意及所给提示,补全单词或用单词、固定短语、固定搭配的正确形式填空。 1. I w_____ if you can finish the work on time. 2. People in Korea are supposed ______ (bow) when they meet for the first time. 3. In the old days, the workers were made ______ (work) eleven hours a day. 4. I can't find ______ (适当的) words to describe her beauty. 5. I have ______ (借) his book for two weeks. I have to return it now.