Tree Planting Day is on ______ of March.
---Must I return the magazine to you right now, Sandy?---No, you _____.You may keep it until next Wednesday.
I don’t know if he ______ me. If he ______ me, I won’t go to the party.
A teacher may also make a mistake if he or she is not _______.
They _______ many happy hours _______ along the beach during the holiday.
If we want to be a _____ visitor in a foreign country, it is important to know how to ask for help ________.