are supposed to

你应该在月底前付款。

You ___are ___supposed ___to pay by the end of the month.

你不应该在这里吸烟。

You ___are not ___supposed ___to smoke in here.

你们应当为外国游客制作一份旅行手册。

You ___are ___supposed ___to create a travel brochure for foreign travellers.