______ I go to school on foot.
We all need partners _______.
Li Ming is in poor health. He should pay more attention exercise.
A small number of the students_______able to plant flowers.
Not only my parents________my little brother______ on the plan to go to the mountains.
— Hey, boy. You can’t cross the street now. You have to wait _______ the traffic lights turn green.— Oh, sorry and thank you.