The film is educational. It is worth ________.
自行车是一种环保型的交通工具，很适合人们上下班骑行及休闲运动骑行。自行车由若干部件构成，其中由有机合成材料构成的部件是（ ）
—So you gave Mary your dictionary?
— ______.She said she'd return it to me when she could afford her own.
