21.The moment we heard the news of the earthquake, we began to ________ the work to rescue those who were trapped in the building.
--The two pairs of shoes are __________ the same colour. --But they are different __________ colour.
Mr. Smith__________ the roll of film as soon as he arrived home
The shop manager always says to his assistants, "We can never be______customers.
Why didn't you tell me there was no meeting today? I______ all the way here through the heavy snow.
--I hope he won't get ill during the examinations. --___________ . He has been very well recently.