---Let'sputawayJohnny'stestpapertogiveFatherabigsurprise．---Youdothat．HetoldFatherabouthistestresultthismorning．（）A.can'tB.needn'tC.shouldn'tD
---Let's put away Johnny's test paper to give Father a big surprise．
---You do that．He told Father about his test result this morning．（ ）
A. can't
B. needn't
C. shouldn't
D. mustn't
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