Dawson is the boy (who, whom) is standing beside Mac.
(Which, What) of the two colors do you like best?
(This, These) are my favorite muffins.
(Everyone, Both) are staying after school to help with the parade.
The flowers (what, that) I picked this morning are already wilted.
(That, Those) is the funniest thing I have ever seen.
Ms. Messina is the only teacher (which, whose) office is upstairs.
(Who, Whom) left the mess in the kitchen?
Tomorrow, (what, which) is Thursday, is the best day for me to practice.
(Who, Whose) skates were left on the sidewalk?