He is on his way to becoming a world-famous pianist. But can you imagine him ____ so many kinds of hardships?
-Oh, it’s you, Steve! I ________ you. -No surprising. I’ve just had my hair cut.
I would have come sooner but I ________ that they were waiting.
—Did you find the missing couple in the mountain yesterday? —No, but we ________ to get in touch with them ever since.
—Such a mistake could have been avoided. —Unfortunately, he ________ the mistake again and again.
The student didn’t pay any attention to the lecture; he ________ of something else.