After Yang Li Wei succeeded in circling the earth, _______ our astronauts desire to do is walk in space.
Nobody knows how he was murdered, but _______ people behind the scenes can guess why.
Coffee, which is becoming more and more popular, was first grown in _______ is now part of Brazil.
To make your work easy to solve, you can______ with one other class member if you want.
----May I come in and have a seat? ----______, make yourself comfortable.
Students are selected for scholarships ______an open, national competition.