問題詳情

(2)  Each year on October 31, children across North America dress up in costumes. Looking likemonsters, witches, ghosts, and many other things, they go from house to house, (21) on doors.When someone opens the door, the kids say, "Trick or treat." The people answering are supposedto give each child a small (22) of candy. Ask any child in the US or Canada, (23) they'llsay that Halloween is their favorite night of the year. Adults like to join in the festivities as well.Very few Halloweens go by without office parties or other celebrations.Halloween today is strictly about fun, but it was (24) a religious holiday. November 1 isknown as All Saints' Day, an important Christian holiday. The belief is that on the eve of October31, ghosts are allowed to come back to the land of the living. By dawn, however, the ghosts mustreturn to hell until the same time the following year. It is only on this single hallowed evening(25) ghosts can return from the dead.
21.
(A) knock
(B) knocking
(C) knocked
(D) knocks

參考答案

答案：B
難度：簡單0.783784
統計：A(2),B(29),C(5),D(0),E(0)

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