单选题
Caller: Hello. I'm ringing about the flat advertised in today's STAR.______?Mrs. Green: Yes, it is. Two or three people have rung up about it, but nobody's been to see it yet.
【正确答案】
A
【答案解析】从Mrs．Green的回答来看，Li是想知道房子是否已租出去了，符合这种问法的只有A项 Is it still available? empty表示“空的”，free意思是“免费”或“自由”，blank表示“(纸张，表格等)空白”。