construction site in our city the workers have uncovered an ancient wall that_______ to keep the enemy out of the city, but it requires further evidence.

can hardly hear the radio. Would you please _________

sad to me that they, so poor themselves, ________ bring me food.

‘m willing to help, I do not have much time available．

Trains with the first letter D or Z can run __________a speed of more than 200 kilometers an hour when it travels __________ thedesert.