U4-Ex. 4 Fill the blanks with the words given below. Change the form where necessary. aspect, participate, hesitate, inquiry, intend recommend, investigate, undertake, resource, economical 1. The Channel Tunnel ( 英吉利海峡隧道 ) is one of the biggest engineering projects ever ________. 2. He took it as an insult ( 侮辱 ) which wasn’t at all what I ________. 3. As a freshman, you should get to know campus _________ as soon as possible and make good use of them. 4. He had made many ________ into the quality of the computer before buying one. 5. The police ________ many cases by following the footprints ( 脚印 ) left at the scene of the crime. 6. I’m thinking of buying a car. Can you ________ a good make ( 牌子 ) to me? 7. Not only does Mary attend class regularly, but she also_________ in extracurricular activities frequently. 8. With the rapid development of the economy, all ________ of our life have changed a great deal. 9. Tom is such a nice guy. He will not ________ a moment to offer help when you are in trouble. 10. This system is extremely ( 非常地 ) ________ because it runs on half-price electricity.