A.atB.inC.fromD.down
A. at
B. in
C. from
D. down
The doctor suggests that a pemon________exercises every day if he wishes tobe healthy．
A. does
B. did
C. do
D. will do
We wi]l not go to the party_________We are politely invited．
A. if
B. however
C. whether
D. unless
The very core of marketing lies in________.
A. all understanding of consumer needs
B. the efficient movement of goods
C. developing new wants for consumer goods
D. making goods readily available to customers
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