The boss________company I worked in two years ago has________in solving such kind of problem

What day is it today It’s __________.

Did you finish _____ the book—Yes, I did. Thanks ____ your dictionary, I had a better understanding of it.

The fog was so heavy this morning that drivers could hardly ________ the things just ten meters away from them.

This math problem is as________as that one．I can’t work it out．