—Come on，please give me some ideas about the project.—Sorry.With so much work ________ my mind，I almost break down.

 ____ many times, I could not remember her telephone number. 

.The vocabulary and grammatical differences between British and American English are so few and unimportant as hardly______.

In order for a new sport _______, a current sport must be dropped. 

Everyone here will thank the firefighters for the things they did to prevent fires ________the environment safer.