A：铝丝在硫酸铜溶液中能形成“铜树”
B：铝的熔点低于铜的熔点
C：空气中铁比铝更容易被腐蚀
D：铝在地壳中含量比铁高
— I have great ____ in finishing the work by myself. Could you help me?
— No problem.
