50. Thanh spends 3 hours a day doing the homework.
    A. It takes Thanh 3 hours a day to do the homework.
    B. Thanh wastes 3 hours a day done the homework.
    C. Thanh took 3 hours a day to do the homework.
    D. It took 3 hours a day for Thanh to do the homework.
51. My friend is keen on learning different languages.
    A. It is my friend keenness to learn different languages.
    B. Learn different languages is my friend’s hobby.
    C. My friend would like to learn different languages. 
    D. Different languages is my friend’s hobby.
52. “You’d better stay at home during this time” he said to Lan.
A. He ordered Lan to stay at home during that time.
B. He warmed Lan against staying at home during that time.
C. He advised Lan to stay at home during that time.
D. He thanked Lan for staying at home during that time.
53. Carol: “Listen to that song”. 
A. Carol said to listen that song.
B. Carol told us to listen to that song. 
C. Carol asked us to listen to this song.
D. Carol talked me to listen to that song.