Would you say "a big apple", or "an big apple"? 

Would you say "a sunny day", or "an sunny day"? 

Would you say "a elephant", or "an elephant"?

Would you say "There is a house on the moon!", or " There is an house on the moon!"? 

Would you say "I am going to a café this morning", or "I am going to an café this morning"?

Would you say "a interesting idea", or "an interesting idea"? 

Would you say "I will buy a orange", or "I will buy an orange?" 

Would you say "Jack has a umbrella", or Jack has an umbrella?" 

Would you say "a hour", or "an hour?"     (Make sure you say the sentence out-loud first!) 

Would you say "a university", or "an university?" (Make sure you say the sentence out-loud first!)

Would say "a apple", or "an apple"?