—— Bob has gone to California.
—— Oh, can you tell me when he _____?
A．has left B．leftC．is leavingD．would leave
B
考查時態(tài)題。離開這個動作發(fā)生在過去，跟現(xiàn)在沒有影響了。when引導的特殊疑問句不會出現(xiàn)完成時態(tài)。故答案選B。
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