WhatworriedthemothermostwastheInternetafterclassinthisschool．（）A.herson'snotforbiddingsurfingB.herson'snotbeingforbiddentosurfC.herson'sbeingnotforbiddentosurfD.herson'sh
What worried the mother most was __________ the Internet after class in this school．（ ）
A. her son's not forbidding surfing
B. her son's not being forbidden to surf
C. her son's being not forbidden to surf
D. her son's having not forbidden surfing
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