Answer:
1 ☆ Shouldn't
2☆ Although
3☆amazing
4☆in
5☆decorate
6☆interested
Step-by-step explanation:
1 ☆ Shouldn't ( the person is warning about the disadvantages of staying up late )
2☆ Although ( the film is being described as exciting but Jim fell asleep so you use although to introduce a subordinate clause which contains a statement which makes the main clause of the sentence seem surprising or unexpected)
3☆amazing ( since elephants are ' racing ' its present tense so use the present amazing )
4☆in (' in ' is used in months , years and long periods )
5☆decorate l ( Tet celebrates the beginning of a new year as well the coming of spring so usually people tend to decorate for festivals )
6☆interested ( 'interested' is the only right words to be placed next to 'in' )