-----Where you put the ruler? I can't see it anywhere. -----I put it right here. But now

问题补充：

-----Where you put the ruler? I can see it anywhere.

-----I put it right here. But now it is .

A. have, gone

B. did, missed

C. had ,going

D. will, missing

答案：

A. have, gone

B. did, missed

C. had ,going

D. will, missing

解析：

考察现在完成时态对现在的影响，missing丢失的不能用missed代替。