1.—__________ are they going to buy?
—Eggs.
A.Where B.What time
C.Why D.What
2.That boy is __________ in his class.
A.young B.the younger
C.the youngest D.younger
3.Are you going there __________ bike or __________ foot.
A.by;on B.on;by
C.by;by D.on;on