I.
1/ C
2/ C
3/ A
4/ D
5/ A
6/ D
II.
7/ Thanh is always complaining about the heaviness of my suitcase.
8/ Mount Rushmore can be seen from 100 kilometers away.
III.
9/ Mary is leaving her dirty sockets on the floor.
10/ The doorbell rang when I was watching TV at 8 o'clock yesterday.