---Must I take this medicine, Mom? It ________ so terrible.

---Yes, you must take it for another three days.

A．is tasting

B．is tasted

C．tastes

D．has tasted

自动变速器发生频繁换档的故障，甲说：是换档电磁阀线路接触不良所致，乙说：是ECU内部故障。（）

A.甲正确

B.乙正确

C.两人正确

D.两人都不正确