上下文衔接最好的一项（ ）命运，其实是最公平的，它遵循一条鲜为人知的补偿，它青睐不断拼搏的强者，__________________收获也最多。

No decision _about any future plan until we have done some research into the student preference

Many people believe that hunger is only a problem in the developing countries________，it is a problem all over the world

This new model of car is so expensivethat it is _____ the reach of those withaverage income.[ ]

Tom often helps me ______ my English.