Find one mistake in each sentence and correct it.

1.     Europa might have liquid water and sources of energy that is=>are necessary for life.

     2.  Scientists believe that liquid water might exists=>exist below the surface.

     3.  The surface pressure of Titan’s atmosphere is higher than that but the temperature is extreme=>extremely cold.

     4.  The boy asked if he can=>could fly to the Moon in the future.      

     5.  She suddenly asked me that=> bỏ what I would have done if there had been a war between humans and aliens.