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1visitors are not permitted __the park after dark because of

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1visitors are not permitted __the park after dark because of the lack of lighting
A to enter B entering C to enter in D entering in
1visitors are not permitted __the park after dark because of
选A.首先,permit sb to do sth允许某人做某事 .其次,enter是及物动词.enter + 地点即表示进入…完全没必要加介词in.
另附:permit
1.名词 [c] (authorization) 许可证
2.及物动词 [frm] (allow) 允许
3.及物动词 (make possible) 容许
fishing permit
捕鱼许可证
to permit sb to do sth
允许某人做某事
4.及物动词 (make possible) 使某人可能做某事
weather permitting
天气许可的话
enter
1.及物动词 [+room] [ building] 进入
2.及物动词 [+army] [ profession] [ Parliament] 入
3.及物动词 [+race] [ competition] 参加
4.及物动词 [+new phase] [ period] 开始进入
5.及物动词 (write down) (in book) 登录
6.及物动词 [计算机科学] [+data] 输入
7.不及物动词 [frm] (come or go in) 进来
to enter sb for sth
给某人报名参加某事
as the war enters its second month
当战争进入第2个月时
再问: permit doing sth 有这个词组的吧?为什么不选B
再答: 没有permit doing sth和permit sb doing sth,顶多有permit + 名词。例如: The rules do not permit much flexibility in their operation, so it is important that they operate fairly. 操作规则没有多少灵活性,所以谨慎操作是很重要的。 另外一点,你给的句子是被动语态,变为主动形式就是某人didn't permit visitors to enter the park after dark.正好吻合词组 permit sb to do sth。你见过permit sb doing sth了吗?没有的。