The more you smile, the ________ you will feel.
Tom was disappointed that most of the guests ______ when he ______ at the party.
—Would you like to go for a picnic tomorrow?—Sorry, I have to _____ my homework.
—Why was Miss Lee angry this morning?—Because Tom didn’t _____ his homework.
We are made ________ more confident by our teacher.
He is an explorer ________ a sailor.