We normally use the front entrance （ ） the building but there is another entrance （ ） the back.
（A）to; to
（B）at; at
（C）to; at
（D）of; in
Let’s learn to use the problem we are facing （ ） a stepping - stone to future success.
（A）to
（B）for
（C）as
（D）by
The two sportsmen congratulated each other （ ） winning the match by shaking hands.
（A）with
（B）on
（C）in
（D）to
