11.　 The machine runs every second __________(秒).

10.　 Do you spend much time _____(寻找) through dictionaries for words to use?

9.　　 The children rushed in and out of the crowds,__________(尖叫) with laughter.

8. _________(科学) instruments is widely used nowadays.

7.　　 We did the work ourselves, ___________(节省) us a lot of expense.

6.　　 Much to my ___________(满意), they all got good marks.

5.　　 ___________(星期六) are usually the time for a good rest.

4.　　 This is a bottle filled with __________(咸) water.

3. Children like playing with __________(沙子).

2.　　 Is this house for _________(出售)?