Mr. Bush is on time for everything. How _______ it be that he was late for the opening ceremony?
---If I were you, I ________ study harder
This book is a bit difficult. ________ read something easier?
---Excuse me, does Mr. Zhang’s son live here? ---He________ be here, but he has moved?
–How does your sister study English? --She studies by_________ tapes
My clothes are not fashionable.