book 9 unit 3 综合检测题单项选择 21. --- is mr. fan there? there is something i really need to talk to him about. --- no, he is out. _____? a. what’s that b. what do you want to say c. can i take a message for him d. can you trust me 22. one spring, when i was _____ energetic young postgraduate, _____ undergraduate asked if she could work on a summer project with me. i accepted. a. an; an b. a; an c. an; the d. the; the 23. she said she was in great need of such a table and asked me how much _____
