---Would you go swimming with us? ---____, but I’m very busy now.
28. Think after you read ____.
27. Great changes _______in our city in the past twenty years.
26. He said he would rather not ________it right now.
25. These photos reminded him of the places ________he visited last year.
24. Is this park ________has been built to keep the milu dear? A. which C. the one C. that D. the one that