If only my grandma this together with us now!A. had seenB. could seeC. must seeD. should s

问题补充：

If only my grandma this together with us now!

A. had seen

B. could see

C. must see

D. should see

答案：

A. had seen

(答案→)B. could see

C. must see

D. should see

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