It is required that under no circumstances ______ betray ourselves even if there are temptations like money or beauty.

 -----Did you ask Sophia for help?-----I _____ need to----I managed perfectly well on my own.

I’m feeling much better now so you ______ call the doctor.

— Who’s that man over there standing in the garden? Is it Mr. White?—It __________ be him. He has gone to Shanghai on business. 

My newly- purchased bag is nowhere to be found.____ I have left it on the bus?