Exactly when the first people arrived in ________ we now know as California, no one really knows.

下列各句没有语病的一句是（ ）

lways delighted when I receive an e-mail fromyou ______ the party on July 1st, I shall be pleased to attend

Bob isn’t feeling well. He has caught acold. —Everybody seems to have ____ because of the changeable climate in spring here.

___ environmental damage is done, it takes many years for the ecosystem to recover.