He seems something valuable. He looks so worried.A. has lostB. to loseC. to be losingD. t

问题补充：

He seems something valuable. He looks so worried.

A. has lost

B. to lose

C. to be losing

D. to have lost

答案：

A. has lost

B. to lose

C. to be losing

(答案→)D. to have lost

解析：可联系答.案.网客服索取。