----- What do you think of the advice ______ by our English teacher?

----- No one has given me _________. We’d better take it strictly.

A．giving, a better piece

B．given, a better piece

C．given, the better piece

D．giving, the better piece

既能产生IL-2，又具有IL-2R的细胞是（）

A.B细胞

B.T细胞

C.NK细胞

D.单核-巨噬细胞

E.K细胞