Listen! Is that Linda singing in the next room?— No, it ________ be her. She is still in Shanghai.

If he ________, I __________ him the truth.

Please keep quiet! I’m studying _____ my English test.[ ]

The skirt looks different from others and it is nice.—Thanks. It ______ by my mother last month.

Nancy quickly ________ the door and put down her school things.