Owen's daily English quiz (Day 3)

Owen's daily English quiz (Day 3)
Joseph__Chou has managed to win with a 5/5 and at the same time he was the first one to post.He won both the allotted points and an additional reward.
Today's quiz:
1.If the following sentence is incorrect,correct one mistake:
"We thought that our shirts were the same,but his is different than the one I bought."
2.If the following sentence is incorrect,correct one mistake:
"Although the danger that he might be injured,Kamal bravely entered the burning house in order to save the oldman."
3.If the following sentence is incorrect,correct one mistake:
"Some of the people were standing in the street watched the parade,while others were talking to each other."
4.Fill the prepositions into the following sentence:
"The visitors objected ___ the horrible rooms.They tried to blame the staff ___ the bad condition,and wished to talk ___ the manager.When the manager has arrived ___ the reception,they threatened him ___ spreading a bad reputation ___ the hotel."
5.Find the mistake in the following sentence:
"I had an appointment with Mr Jones.Three hours before the appointment,I changed my mind and called Mr Jones to cancel the meeting."
a.fragment
b.run on
c.comma splice
d.choppy
e.correct
Thanks for your time and good luck as always.

1 different from
2 In spite of the danger that he ...
3 watching
4 to,on,to(with),at,with,for(of)
5