My younger brother dreams ___________ a spaceman.
The young man is intelligent and diligent; be is sure to____in his new position.
Watch out! ____caught smoking here shall be fined.
Nowadays food safety is a big problem and nobody can guarantee all foods are safe to us, but food produced in the normal companies is____better.
The teacher said we____ten lessons by the end of this term.
AIDS is said____the number one killer of both men and women over the past few years in that poor area, where no medical services are available.