【C19】A．knowingB．to knowC．they knowD．known

He seemed _______ the secret.A: knowB: to knowC: knowingD: known

If only I______what you wanted!A．knewB．knowC．had knownD．have known

—Will Tom recover？ —Right now there is no way______.A．of knowingB．to be knownC．for knowing

I would have invited her to the party but I ___ her well.A、don’t knowB、didn’t knowC、doe

【C4】A．knowingB．knowC．knewD．known

Not until last night ______ the news.A.did I knowB.didn I knowC.that I knewD.had I known