obligation: you have to have qualifications, you must have a degree in science, no obligation: Back then you didn't need to know how to live-tweet a story., You're not normally required to have a university degree., prohibition: You weren't allowed to become an astronaut without a pilot's license., You mustn't be a loner or a wannabe-hero.,

GRAMMAR

印刷
埋め込み

リーダーボード

表示スタイル

オプション

テンプレートを切り替える

自動保存: を復元しますか?