1 . I gave the waiter ________ generous tip. (用适当的词填空)

2 . Also, there is a lot of research showing that ________ positive mood leads to higher levels of productivity and creativity. (用适当的词填空)

3 . The whole food chain is affected by ________ overuse of chemicals in agriculture. (用适当的词填空)

4 . Today’s children spend ________ average of four and a half hours a day looking at screens, split between watching television and using the Internet. (用适当的词填空)

5 . Determined never to come back before he could make ________ big fortune, Mike headed to a big city. (用适当的词填空)

6 . We had ________ narrow escape in the accident. (用适当的词填空)

8 . After reading the introduction, I have ___________ strong urge to pay a visit to the spectacular architecture. (用适当的词填空)

9 . Kua Fu could not stop for ______ instant, and he ran like wind all the way, struggling to catch up. (用适当的词填空)

10 . The Grand Canal was ________ notable achievement of the ancient Chinese people. (用适当的词填空)