Some hard parts of my test

After doing this test, I feel unsure about my answers in some parts. Please help me check my answers and if it's wrong, please explain.
I- Choose the correct answer:
2> He enjoys ........... activities like painting and playing music.
a. abstract b.creative c.powerful d.classic
I choose (a)
3>They said they could order it for me because they didn't have my size in ............
a. stock b.shop c.store d.hold
I choose (a)
9> He was ............. in not asking for permission to go out last night.
a. at fault b.at mistake c. at error d. to blame
II- Supply the correct word form:
1> Safety tests on old cars have been ............... thoughout Europe. ( STANDARD)
I use ' standardize'
7> Travelling by public transport in this city is very ............. as there're long delays. (ATTRACT)
I use ' distractive'
9> He was sentenced to four months' ............ for possession of cocaine.(PRISON)
I use ' imprisoned'
10> He gives the ............... that really doesn't care. ( IMPRESS)
I use ' impression'
IV. Sentence transformation:
1> They arrived late because they had a plat tire.
--> Had ........................................
My sentence:'Had had a plat tire, they arrived late.'
3> I advise you not to say anything like that again.
---> I'd rather
My sentence:'I'd rather you not say anything like that again.'
4>His parents don't like him to smoke. ( Using Approve)
My sentence:' His parents doesn't aprrove of his smoking'
8> Learning Chinese is not easy.
------> He finds it ...........................
My sentence:' He finds it hard to learn Chinese '
14> He doesn't like people laughing at him. ( Put into the Passive Voice)
My sentence:' He doesn't like to be laughed at.'
15> Someone saw him pick up the gun.
--------> He was ........................
My sentence:' He was seen picking up the gun'