The river marks the _______ between Mexico and the USA．
A. barrier B. bond
C. border D. edge
I’d like to buy a house—modern, comfortable, and ___________ in a quiet neighborhood.
A. at all B. in all
C. above all D. after all
The publishing house just brought _______ several selections from Chinese poetry, which became the bestsellers last month.
A. out B. in
C. up D. down
Slavery was __________ in the US in the 19th century, and slaves were given equal rights.
A. abused B. adopted
C. abolished D. absorbed
The talk between tow sides broke down in the end, arriving __________ no agreement.
A. to B. at
C. on D. in
____ the aid of a stick, the old man walked painfully along the street.
A. Under B. With
C. On D. In
