I knew I meet her before.()

A.had met

B.have met

C.met

D. meet

A.Oh, that’s Bob, my material arts teacher.

B.Oh, I’d like you to meet my sister.

C.Which one is she?

D.I never knew you have a sister.

She did me such a big favor. _____ I knew her name.

A、if

B、only

C、if only

D、only just

A.If I know

B.If I knew

C.Had I known

D.Have I know

A.hear

B.has heard

C.had heard

D.was hearing

______ what was going to happen, I would never have left her alone.

A．Had I known B．If I know C．If I knew D．If had I known

A.occasion

B. occasional

C.occasionally

D.on occasion