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re ________ be something wrong with her. 2. It ________ be him. He is not so tall as our head teacher. 3. Listen! Someone is singing in the next room. Who ________it be? 4. She ________be, but I’ m not sure. 5. It ________be Tom’ s or Bill’ s. They both like brown. 一、 1 — 5 CDBCA 二、 ’ t b