---This bag is too heavy for me. Could you please do me _____ favor? -----Sure . A. the B. an C. a
Every day we spend half an hourmorning exercise。
The building is the secondin our town。
His father is engineer. He designed such useful machine
—Who is speaking there? —It be Uncle Li. He has gone to Shanghai.
— Amy’s library book is lost? —She has to pay for it.