24. Helen asked Roger, "Can you tell me when __________ to see me?"(A) you must(B) will you have time(C) you will have time(D) you should26. Jane told her not to worry __________.(A) where her son is(B) where might be her son(C) where could her son be(D) where her son might be 25. I’d like to know how __________ improve the design.(A) am I(B) I am(C) could I(D) I could 27. I wondered __________ mean it. ?(A) did he really(B) he really(C) if he really(D) if he do really 28. The ministers agree __________ global warming is a serious world problem.(A) that(B) what(C) which(D) with 29. __________ he has signed the contract or not doesn’t matter.(A) When(B) Whether(C) If(D) What30. My mother told me __________. ? ?(A) what it was the purpose of our visit(B) what the purpose of our visit was(C) that the purpose of our visit was(D) that was the purpose of our visit 空格添什么