选出与所给句子划线部分意义相同或相近的一项。

—I'm kind of tired after hard work.

—You'd better have a good rest before the big test. [ ]

A. a lot

B. lots of

C. a little

D. a few

转基因鱼所带的外源基因可通过遗传传递给子代，但子代个体间外源基因的拷贝数差异很大。