I feel it hard to keep up with my classmates in study and sometimes I lose heart. But whenever I want to ________ , my teacher always encourages me to work harder.

________did your uncle leave his hometown?—He ________ for nearly twenty years.

Have you finished your work yet?　—No, not yet. I think it’ll take _____ ten minutes.

Tom, keep ________the fire, or you will get burnt.

Father’s Day is on _________ Sunday of June.