Can you imagine that a smart man like him ___________ make such a stupid mistake?

— Jack, take more clothes when going camping. It ______ be very cold in the mountains.— Thank you, Mum. I will.

--Jack had prepared for the game for such a long time. We all thought he ________ it. -- What a pity! He ________ too nervous when playing it.

– When can I get the ticket for the opening ceremony? -- Don’t worry. You ____ get one this very afternoon.

-----Do you know where David is ?  I couldn’t find him anywhere.-----Well. He _______have gone far-----his coat’s still here.