31. I tried to telephone you, but I couldn’t ____________.
—Is there a fog in the evening?—There _______ be. I’ll make a phone call to find it out.
—Is there any flight to Tokyo today?— I think there _____, for the weather is too bad.
—We need a person badly to think up such an idea.—_______ the new comer have a try?
Sorry I’m late. I ______ have turned off the alarm clock and gone back to sleep again.
I’ve tried several times, but the car just _______.