21. Do you still remember the chicken farm _____ we visited three months ago?
A. where B. when C. that D. what
22. Look out! Don’t get too close to the house _____ wall is being painted.
A. whose B. which C. of which D. that
23.______is reported in the newspaper, talks between the two countries are making progress.
A. It B. As C. That D. What
