1 . 博物馆要求参观的游客不得在馆内拍照。(request)

2 . All members are requested to be present at the party .(用It作形式主语改写）
__________ __________ __________ __________all members be present at the party.

3 . It is highly r______ that parents should not allow their children to play computer games too much. （根据首字母单词拼写）

4 . 根据要求，现在在公众场所每个人都必须佩戴口罩 (mask)。（It’s requested that...）（汉译英）