By 2013, cases of AIDS had been reported in Harbin, thus _____ AIDS a provincial concern.

The professor could tell by the _______look in Maris’s eyes that she didn’t understand a single word of his lecture

Tony has a new bike. It is different from .

d of my sister, but she has a serious shortcoming. She _______ be reallystubborn.

He should have come to join in the thorough cleaning. —–He________, I think. It’s not his turn.