Sentence 1: Bobby and Sue went to the zoo yesterday. 
 Sentence 3: They also saw penguins which they love 
 Sentence 4:  They had lunch and bought souvenirs 
 Sentence 5:  They took lots of pictures to remember their special day 
 Option 1: They didn't get a chance to see any of the animals. 
 Option 2: They saw the bears, lions and tigers.