Ⅰ.语境填词
1．As is known to us all，salt ________ (溶解) in water.
2．The minister’s visit to America ________ (目的) at expanding relations between the two countries.
3．The lock has ________ (生锈) and needs oil.
4．Please leave the ________ (试管) for one week.
5．I came to the __________ (结论) that he had been lying.
6．He kept his ________ (平衡) with his arms on top of the wall.
7．The ________ (沸腾的) kettle was giving off steam.
8．What was his ________ (反应) to your answer?
9．We have bought lots of __________ (设备) for our new lab.
10．As a result of pollution，there are many dead fish ________ (漂浮) on the water.
