we eat ____ every day.a.health food b.healthy food c.health foods d.healthy foods
we eat ____ every day.
a.health food b.healthy food c.health foods d.healthy foods
all of us find ____ necessary to take excise every day.
a.this b.that c.it d.them
who's the man over there?is it Mr.Black?
it ____ be him.he's much taller.
a.can't b.mustn't c.should d .may
his parents have been ill and he has to ___ them.
a.look up b.look out c.look for d.look after
where's your sock?I think it's under the bed.
Oh,yes.You ___ look after your things.
a.must b.can c.could d.want
我们亲眼看看吧.
Let's ___ ___ ourselves.
____ of the surface of the earth is covered with water.
A.first third b.two thirds c.one three d.two three