Maggie ran back to the kitchen, eggs ______ carefully in her hands.

A．to be held

B．held

C．were held

D．holding

Science is still ______ of the causes of many kinds of cancer.

A．ignorant

B．unconscious

C．conscious

D．informed

I don't know his address, ______.

A．otherwise I will write to him

B．otherwise I would write to him

C．otherwise I had written to him

D．otherwise I would have written to him

Which of the following objects was an important woodworking tool used by early American craftsmen?

A．A bust

B．A decoy

C．A figurehead

D．A chisel

Even if it ______ this afternoon, I will go there.

A．has rained

B．will rain

C．rains

D．will have rained