27.The question _______ at present has something important to do with our nature.
Tom has been preparing carefully for the English examination, so that he can be sure of passing it at his first ___ .
—Did you ask your pen pal ___? —Yes, he’ll come here after the exam.
I found lots of people were visiting the beautiful mountains when I ___ the car.
I’d like to have a picnic with you in the park. ___ , I’m too busy today.
The doctor ___ the crying boy, but he couldn’t find what was wrong with him.