— ________ is it from the school to the zoo?— Only five kilometers.
Grace has been a teacher for two years. She ______ in a school when I first met her.
Mary is tired of learning because she is always ______ to do better than she can , both at school and at home.
—All the oil in the world will ______ some day. —Yeah. What shall we use at that time?
—How wonderfully Jim is swimming in the pool! —It ______ be Jim. I am not sure.
—Have you seen Jack? —Oh, yes, he walked ______ me just now.