______ it have been the failure to pick up directions from the ground control that caused the air crash?
They must be working because they have a lot of work to do yesterday.
“How does he make living”? As matter of fact, He is a policeman.
------I haven’t done well in the English oral exam, have I?------ , at least you tried.
_____ you didn’t know the rules shouldn’t be an excuse for your failure to report.
— Did a letter come for me this morning? — Yes. _____ came for you.