It is dark outside, so please____ your step while going down the stairs.
The student couldn’t ______ what the teacher was trying to explain.
I mean ________ aboard and nothing is going to stop me, though that means _______ my parents for a long time.
It is generally considered unwise to give a child ________ he or she wants.
Six players can ________ a volleyball team while a football team is ________ eleven players.
All passengers are expected to fasten the seatbelts when the plane takes off and lands.