高等继续教育 / 电子商务英语
正确率：100%
题型描述: 单选题
Perhaps it will be a long time ＿＿＿＿＿＿＿＿from abroad.
A.when Tom comes back
B.before Tom comes back
C.that Tom comes back
D.when Tom will come back
Perhaps it will be a long time ＿＿＿＿＿＿＿＿from abroad.
A.when Tom comes back
B.before Tom comes back
C.that Tom comes back
D.when Tom will come back
参考答案：