Directions: For the Error Identification questions, each sentence contains four underlined words or phrases. Select the one word or phrase that must be changed in order for the sentence to be correct.

1. Since William had been seriously ill for several months, his parents were concerned about him wanting to return to school full-time.

2.The mother cried as her child laid on the examination table after the accident.

3.The students were quite surprised to find these kind of archeological ruins in the particular area that they had chosen for the dig.

4. John stayed up all night long trying to solve a physics problem.