— Can you explain ____ you have been late for school several times this term?— Sorry, but it is the first time that I have been late this week.
When did you ___ him?
I’ll get my secretary ___ the letter.
Mary hasn't decided whether to take up tennis, basketball, or ___.
You’d better come to my home tomorrow, because ___ to show you some of my best stamps.
“Do you mind ___? ” “Go ahead.”