33. Tung asked Nga what she was doing on summer holiday that year.

S + asked + O + Wh + S +V (lùi thì)

HTTD --> QKTD

this --> that 

34. If Thuy didn't study English lazily, she could pass the entrance exam.

if 2: If + QKĐ, S + would/  could + V1 

35. Laura painted the picture which is being shown in an exhibition.

S + V2/ed : thì QKĐ

N (vật) + which + V / S +V

S + am/is/are  +Ving + V3/ed: bị động - thì HTTD

36. Though the road was slippery, they still drove very fast.

Though + clause, clause: mặc dù 

S + be+ ADJ 

S + V + ADV

`color{orange}{~MiaMB~}`