1.She had many ________(失败) before finding the right method.         

2.After ten years of __________(婚姻), the couple were divorced.           

3.As we joined the big crowd, I got _________(分开) from my friends.       

4.We are warned that a cold current is_________（很可能）to come.      

5.The discovery is important for a _________ (各种各样) of reasons.    

6.Thundering is one of the natural _________(现象).                

7.Without any _________(犹豫), she took up the red flag and rushed out.

8.I found my father sitting in his chair, completely ________(吸引) in a magazine.

9.There is a lot of oil __________ (漂浮) on sea water.                        

10.I went _________ (城市商业区) to do some shopping today.