1.B

2.B

cấu trúc câu tường thuật :

S + said +that + S + V(lùi thì) ....

my-> his/her

Tobe ưu tiên chia were

3. A 

Because of + N/ V_ing +....

39. Phong said “My parents are very proud of my good marks”
Phong said that his parents were very proud of my good marks
Phong said that his parents were very proud of his good marks
Phong said that his parents are very proud of my good marks
Phong said that his parents are very proud of his good marks

Câu tường thuật ở dạng câu kể: S+ say(s)/ said+ (that)+ S+ V.
- says/ say to+ O `to` tells/ tell+ O.
- said to+ O `to` told+ O.
40. Her classmate said “Lan is the most intelligent girl in our class”
Her classmate said Lan were the most intelligent girl in their class
Her classmate said Lan was the most intelligent girl in their class
Her classmate said Lan is the most intelligent girl in our class
Her classmate said Lan is the most intelligent girl in their class

Câu tường thuật ở dạng câu kể: S+ say(s)/ said+ (that)+ S+ V.
- says/ say to+ O `to` tells/ tell+ O.
- said to+ O `to` told+ O.
41. She didn’t go to the circus with Betty because she had a bad cold
She didn’t go to the circus with Betty because of having a bad cold
She didn’t go to the circus with Betty because of have a bad cold
She didn’t go to the circus with Betty because of she had a bad cold
She didn’t go to the circus with Betty because of she have bad cold

Cấu trúc because of+ V-ing/ Noun phrase/ the fact that, clause.