8. A sudden noise of a fire-engine made him()to the door.

25、Although we have achieved some success, we should work harder _______ now on.

24、We think _______ highly probable that our plan will work out.

23、We are disappointed to find that the quality of the products here _______ very poor.

22、You have caught a bad cold so you _______ stay in bed now.

21、I＇m sorry that I＇ve kept you _______ for so long.

20、They all go outing on such a warm spring day ______ Mark. He is busy with his lessons now.

19、The children _______ play with them.

18、Who should be responsible ______ the loss of the documents?

17、Farmers use water in many ways. ________, they use water to grow crops.

16、Fish can＇t live ______ water.