—There aren’t any toys in our suitcase．Where have you put them?
—Oh, no．That old lady sitting next to us have taken ours by mistake.
A. must
B. could
C. should
D. would
网友回答
(答案→)A. must
B. could
C. should
D. would
解析：情态动词用法题。Must用于肯定句中表猜测，我们的行李箱中没有玩具你把它们放哪了？哦，天哪，坐在我们旁边的老太太肯定错拿了我们的玩具。