—Do you know Mr. Smith from America?
—Yes, I________ him since 2008.
A.know B.knew C.have known D.will know
—Listen! Is Lily singing in the classroom?
—No. It _____ be Lily. She has gone to Paris.
A.may not B.needn't C.can't D.won't
The boy ________ his bike and hurt himself because of the heavy rain.
A.took off B.turned off C.set off D.fell off
I saw a boy running ________ the field ________ an umbrella in his hand just now.
A.across; about B.through; with C.in; for D.in; with
In order to keep fit, people wish to eat ________food than before.
A.healthy B.the healthiest C.healthier D.healthiest
That factory has found a way to the waste and doesn't put it into the river any more.
A.recycle B.produce C.create D.protect
