SO THAT问题

so: 所以,因此
so that: 为了,以便
so...that: 结果,以至

so that 是表目的
eg：Tom gets up very early so that he can catch the first bus.
so...that 是表结果
eg：This city is so beautiful that a lot of visitors visit here.

从第2题中so that后面从句没有主语就可将其排除,第2句意思是"因此她经常在她办公室里吃。"

like作副词意为好象与第2句usually不搭配
而like作为"喜欢"意思的用法
一般搭配为
like to do sth. 是指即时的，即兴的动作
eg: I like to do some shopping 我想要去逛街
like doing 是指一种持续的习惯
eg: I like shopping 我喜欢逛街

显然题目选第2个是错的,应该选副词usually意思是"常常"

she usually has a sandwich, so she usually eats in her office.
她常吃三明治,所以她经常在她办公室吃。
(因为吃三明治方便不需要出去,所以就在办公室吃,有因果联系。)

如果要两句话拼起来的话，应该是
she usually has a sandwich, so she usually eats in her office.

1.she usually has a sandwich
2.so that usually eats in her office

1.she likes has a sandwich.
2.so she usually eats in her office
这两句是对的。