As is known to us, theory is based on practice and servers practice. A. by chance B. in turn C. in return C. by turn
We still remember once round the famous tower when we were young.
— Marx looks nervous.— So you if you had so fierce a competition.
caused the accident is still a mystery.
______ you are alone at home, why don’t you go with us to the party?
Can you ___me to call Mr. Smith this afternoon? You know how forgetful I am.