听下面5段对话，回答第1-5小题。 1. What does the woman mean? [     ] A. She can't accept the man's invitation. B. She wants the man to invite her cousin, too. C. She's promised to have dinner with her cousin. 2. What does the man mean? [     ] A. He doesn't know the woman. B. He is not certain whether the woman has a sister. C. He is not sure whether the woman knows his sister. 3. What does the man enjoy doing? [     ] A. Going to the English class. B. Having lunch. C. Working in the garden. 4. Which of the following statements is true? [     ] A. The man got ill while he was in Beijing last year. B. The man hasn't been to Beijing yet. C. The man went to Beijing last year. 5. What time is it now? [     ] A. 9:00 B. 9:30 C. 10:00