—Is the woman over there Miss White? —It ______ be her. She’s gone to Hangzhou.

As a student, you must ______ your teachers.

——Don’t put the bike_______the teaching building.——Sorry, I won’t.

So many people violate traffic regulations that we ____ put too much emphasis on the importance of traffic safety. 

—Must I make a phone call to him now?  —No, you________. You ______ write an email.