Writer complete sentences

Giải giúp mình câu 31,33,34
 
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1) SENTENCE BUILDING: Writer complete sentences with t
Question 29:
America / discover/ Christopher Columbus/ 1492
->
→ _America was discovered by chri
Question 30: If I/be
/
you, I/ not do / that
→ IHI were you, I wouldn't
do th
(2) SENTENCE TRANSFORMATION: Complete the second
meaning as the first one
Question 31: The wall looks dirty because it isn't painted.
If
Question 32: I didn't know that Joe had to get up early, so I die
alf_T had kucaw that joe had to get
Question 33: People sell stamps in a post office.
saStamps
Question 34: My father planted this tree last month.
a This tree
-HÉT-