u know the reason why he failed —No, he’s a hard-working man___________, hefailed finally.

Did Daniel take my football away?—No, I think it _____ be him, for he doesn’t play football at all.

Harry Potter is such an interesting book_______all kids like to read.

Nobody but a few little boys ___ in the garden now

With a lot of difficult problems ____, the newly-elected president is having a hard time.