All of sudden some passengers on_____board let out screams, running upstairs like crazy.
1 think we'd better keep to the subject, ______we'll waste our time.
No one can exactly tell us what .
---Look at the glasses on the desk.Are they David’s? ---They belong to him.I saw him go out with glasses just now.
of our classmates are good at basketball.
---skirt is blue.is red.Which of them do you prefer? --- is OK.I like their styles.