题目

41. It's not likely that Sarah ___________________ her assignment by Friday. (finish) 42. I’ve just realised that next Friday we ___________________ in this flat for five years. (live) 43. Do you suppose he ___________________ for us when we get to the cafe? (still, wait) 44. I expect Zoe ___________________ the house as soon as I tell her I'm on my way. (leave) 45. I don't think Christian ___________________ his cold by Saturday. (get over) 46. By the time he gets his next salary he ___________________ baked beans for a week! (live on) 47. I hope they ___________________ us; we下列说法正确的是 A.加入过量氨水,有白色沉淀生成,则原溶液一定有Al3+ B.加入K3[Fe(CN)6]溶液,产生特征蓝色沉淀,则原溶液一定有Fe3+  C.加入盐酸酸化的BaCl2溶液,有白色沉淀生成,则原溶液一定有SO42- D.加入NaOH溶液,产生气体使湿润的红色石蕊试纸变蓝,则原溶液一定有NH4+
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