21. - Did you_______ your grandparents last month?
- No. They didn't go to school when they were young. So they can't read or write.
A. heard of B. hear of C. hear from D. heard from
22. - What do you like about Suzhou? -_______.
A. Modem B. Its gardens C. Wonderful D. The Palace Museum
23. -_______. I try on thos