With an appropriate modal verb:
(1)Children under 12 years of age in that country ____ be under adult supervision when in a public library. (2)You can't imagine that a well-behaved gentleman ____ be so rude to a lady.
must; should
With an appropriate modal verb:
(1)Children under 12 years of age in that country ____ be under adult supervision when in a public library. (2)You can't imagine that a well-behaved gentleman ____ be so rude to a lady.
must; should