He knows _______ English but he has _____ English friends.

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

Must Jack come to sign his name on the paper?—Yes, he_____ .

People were excited when they saw “Monkey King” 2014 the Yellow River Estuary (入海口，河口) International Marathon.

_______have you been learning to swim?—Half a year. [ ]