Accustomed to ______ the steep mountain, he had no difficulty reaching the top. 

______ on time,  or you’ll be fired.

 For many years we have been keeping in ____by sending each other e-mails or phone calls.

________ you stepped into the lab with your shoes on? You’re supposed to take them off before you enter it. I told you so!

I made ___ clear to my team that I want our initial reviews completed this week.