1. He often stopped at the sound of his own steps and was afraid to look ________ shoulder.

A) over B) back C) round D) beyond

2. The persons that have the greatest influence ________ children are their teachers.

A) in B) on C) for D) to

3. Cambridge has announced plans to establish a business school ________ the master’s degree in business administration.

A) representing B) presenting C) offering D) supplying

4. Many Europeans ________ the continent of Africa in the 19th century.

A) exploded B) explored C) exposed D) expanded

5. The police are ________ the records of all those involved in the crime.

A) looking into B) looking after C) looking out D) looking on

KEY：1-5 CDBDC