仿照例句，将下列句子合并为含定语从句的复合句。 Example: I like these singers. They write their own music. → I like these singers who write their own music. 1. I like Maria. She is clever and friendly. _____________________________________ 2. Here is the key. You're looking for it. _____________________________________ 3. This is the best movie. I have seen it. _____________________________________ 4. Do you know the girl? She is making a telephone call. _____________________________________ 5. Let's go to the new sports center. It has just opened in our town. _____________________________________