Though it was somwing heavily,__kept working in the field.

问题描述:

Though it was somwing heavily,__kept working in the field.
a.but we
b.however we
c.therefore we
d.we
答案说选d.为什么?为什么不是b

在英语中用了尽管就不用然而.
类似的还有因为,所以;虽然但是,等等.