If you sit in an office all day long and rarely _____, you’re likely to suffer from neck andback pains.

—How about your interview, Tom?—I’m confident that I have made a good______ .

The general manager thought of______ problems before he made the final decision. 

Mary________ her sister in appearance but not in character. 

Not knowing how to grow crops，the primitive people had no ______ but to gather the fruit and hunt animals for food.