It was in the wooden house______ a businessman built by collecting funds______ the great scientist carried out the experiment that made a difference.

We tried our best to ______, but she didn’t stop crying.

What should we do now, Mr. Clark?——Please turn to Page_____and look at the_____picture.

My birthday is _____ September 13th.[ ]

______is your birthday gift, Linda? — It’s a circle.