A:broke away
B:broke u
C:broke dow
D:broke out
——She's seldom asked to do housework at home, she?—— . Her parents are very busy with their work, so she has to do the laundry every day.
严重干旱可能造成作物颗粒无收,从光合作用的角度来看,这表明光合作用的重要原料是( )。