问题
选择题
—Is Tom still in New York or already back at home?
—I’m not sure _________. I’ll call to make sure.
A．if he has been back
B．that he has come back
C．why he has come back
D．how he will be back
答案
答案：A
题目分析: 句意：汤姆还在纽约还是已经回国了？我不确定是否他已经回来了。我会打电话确认的。if he has been back是否他已经回来了， that he has come back他已经回来了，why he has come back为什么他已经回来了，how he will be back他将怎么回来；根据not sure不确定，可知选A。