Some of the students are afraid of the teachersstrict with them.

I won’t have time to go shopping with you this afternoon. — But you ________ me yesterday.

I can’t spend _________ money on the car which is _________ expensive for me.

．—Has your father finished his report?—Sorry，I don’t know．He ________ it this morning．

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