Being examined twice a year, whether it is a car or a bus or a truck, it is the rule that every driver____ obey in this city.

We ________the difficulty together, but why didn’t you tell me?

-- Who do you think _____ such a foolish thing?-- It _____ Tom, but I’m not sure.

— I am going to spend my holiday in the countryside. — ________. The air there is fresh and the views are attractive as well.

– Amazing! You _____ have won the first prize in the national English speech contest!– I’m lucky that all my efforts have finally paid off.