To be successful, you must be smart, confident, and, ______ honest

Do you know how to operate________equipment in the lab

What impresses me most is________he appears in front of others，he wears a sincere and charming smile.

Scientists from different countries are tryingto_______ a good way to solve the energy problem.

do you think of the price of these computers—They are at least equal in price to, if not cheaperthan, ________ in other companies