用所给词的适当形式填空。 1. You are never too old ________ (learn). 2. I stopped_________(sing) and began to read. 3. Tom ________ (start) playing tennis when he was 7 years old. 4. Would you like ________ (join) the swimming club? 5. He learned________ (swim) when he was only 6. 6. What can I do ________ (become) famous? |