---so much homework,little Tom can hardly find time to play

1.装载有
be loaded with 装载有...put.away 收拾 ；放好
2.被装上
let alone 不干涉; 更不用说...be loaded with 被装上...be located in 位于 ……
3.装着,装满
be limited to 局限于...be loaded with 装着,装满...be mad about 入迷
4.载有；装有某物
be left open 没关上；听任……开着...be loaded with 载有；装有某物
这道题选B,这是一个原因状语从句.
句子可以这样还原
As little tom is loaded with so much homework,little Tom can hardly find time to play in the garden.
但是如果用过去分词引导状语从句的话,As little tom is 是可以省略的,所以就是答案B