Children are ------by health experts to take more physical e

如果是AD里面选择,则选D不选A.
该句是一个被动句,换成被动句后就变成了哪个动词可以有：V + sb to do sth的结构问题了.
很明显,可以说advise sb to do sth,而不能说suggest sb to do sth,所以D为正解.
suggest的结构一般是：suggest sth (to sb),suggest doing sth,suggest sb/one's doing sth 或 suggest + 宾语从句,但绝对没有suggest sb to do sth的结构.