急 its it's their 的用法

急 its it's their 的用法
1.The three victims were members of a National Guard unit that had just completed _____ first week of training.
A) its
B) their
2.Applicants are assigned a time based on their Social Security ____.
A) number
B) numbers
3.Each member of the audience was given a flashlight and told to turn ____ on when instructed to do so.
A) it
B) them
4.Demonstrating _____ commitment to the environment,Penn State has signed a contract to obtain 5 percent of its electricity from wind-generated energy.
A) their
B) its
5.The planning commission voiced _____ disapproval of the construction at last night's meeting.
A) its
B) their
6.In some cultures,courage and bravery in battle ______ heroic qualities.
A) constitute
B) constitutes
7.Young people,whether they live in the United States or Europe,often ______ rock performers.
A) glorify
B) glorifies
8.Athletics ______ an area that produces many heroes.
A) is
B) are
9.The cause of hero worship ______ the people themselves.
A) is
B) are
10.Neither one of the *ers had ______ sentence reduced by the commission.
A) their
B) his
11.The committee,made up of four members,will submit ________ final report Wednesday.
A) their
B) its
C) it's
12.Every scarf on her shelves had outlived ______ usefulness.
A) their
B) it's
C) its
13.Either the table or the dresser must have _____ surface refinished so they will match.
A) their
B) its
C) it's
14.Members of the baseball team will leave for ______ next game Tuesday.
A) their
B) its
C) it's
15.The team is preparing for _____ first road trip.
A) its
B) their