21. --- Could you come here before 2 o’clock?
--- __________. I’m still in the hospital with my daughter by then.
A. I think so B. I hope so C. I’m afraid so D. I’m afraid not
22. ---How long do you help your mother with the housework every weekend?
---For about________________.
A. one and half hours B. a half and an hour
C. an hour and half D. one and a half hours