In william shakespeare's play hamlet, why does polonius spy on hamlet and gertrude in act iii, scene iv?

American history (is, are) studying the american colonies.

Does anyone know the answers to k12 1.18 unit test: the power of poetry (need answers asap)all the questions are here:

Something you may do if the weather's nice on sunday. -something you might not want to do this evening. -something you could go on aaturday evening. -something you could wear to a party. -somebody you might see in the next couple of days. -a subject you could study at college or university. -somewhere you might go on holiday .