–I’ll be back at 4:30. Will you still be here? -- I’m afraid not. I’ll probably have gone

问题补充：

–I’ll be back at 4:30. Will you still be here?

-- I’m afraid not. I’ll probably have gone out then.

A. by

B. since

C. from

D. till

答案：

(答案→)A. by

B. since

C. from

D. till

解析：可联系答.案.网客服索取。