Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks.

Going to party can be fun and (19)_____. If you are invited to a party, (20)_____ call your host up early to inform him or her of whether you are going. If you want to bring someone who has not been invited (21)_____ you, you should ask for permission first. Remember to dress appropriately for the party. You will stick out like a sore thumb if you are dressed (22)_____ whereas everyone else is in T-shirt and jeans. If you are not sure what (23)_____, do ask your host.

Going to party can be fun and (19)_____.