Sam _____ some knowledge of the computer just by watching others working on it.
Don’t worry. We’ll keep you _______ what happens.
Mr. Smith was quite satisfied with his new flat______ beside the West Lake Park and decided to settle down there.
_____, Carolina couldn’t get the door open.
Don’t worry. There’s still time ____a newspaper before the bus leaves.
Every Monday morning, students in our school would stand at attention, watching the national flag ______.