_____seen,itwillneverbeforgotten.
A、Once
B、After
C、Though
D、Unless
—What'stheyoungman?
—______.
A、Heisfriendly
B、He'sateacher
C、He'sfine
D、He'sTom
Childrenshould_________wastewater.
A、tellnotto
B、betolddon’
C、betoldtodon’
D、betoldnotto
Only5_____ofthepopulationofAmerica_____farmers.
A、percent,are
B、percents,is
C、percent,is
D、percents,are
Howlongdidtheconcert______?
A、go
B、last
C、take
D、make