--_______David be the new chairperson of the Birdwatching Society ?--He ________be, but I’m not certain about it.
If you shout at your parents very loudly, you should ________ sorry ________ them.
There are ________ of students in our school, but only ______ are girls.
It’s very nice ________ pictures for me.
The little girl didn’t know ________ story.
You can find ______ island and an old man lives there ________.