—Someone is knocking at the door. Is it Ann?—It ________ be her. She is giving a performance at the theater now.
Nobody except Tom and Mary _______in the classroom. The other students are watching the basketball game on the playground now. A. am B. is C. are
How time flies! We'll graduate. Three years really s short time. A. was B. are C. is
There________ many trees in front of my house now.
How beautifully she sings! I have never heard _______ voice.
He is taller than _______ girl in his class.