- Was it because of his laziness_______ he didn't do the experiment successfully?- No, it was because of his carelessness.
This story was very exciting.I ___ it before.
I ___ Japanese since 1977.
I___ my pen.I have to write with a pencil.
The boy with a book in his hand __ to see you since nine o’clock this morning.Can you see him now?
It’s the first time I __ to see you this year.