----My e-dictionary is nowhere to be found. Who ______ have taken it? -----Keep looking and you will find it. ________ you have good luck! 

 He hesitated for a moment before kicking the ball; otherwise, he ___________ a goal.

English is a language that many people around the world ____ not speak perfectly but ____ at least understand.

______ you need any help, you can always phone me at the office.

I was supposed ____ her, but I failed.