In zones where earthquakes are known to occur, ______ construction techniques can significantly reduce the effects of seismic wave.
| A．to improve | B．improving | C．improved | D．being improving |
It was ________ of my secretary not to have let others disturb me this morning when I was occupied with my work.
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“Without Chinese toys, kids around the world ________ not have so much happiness.” said an European Union official.
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I was lucky enough to get on the train before it ________.
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The man must be the leader of the group, easily ________ by his special uniform.
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Teamwork, or cooperation, is ________ it takes for a football team to win a game.
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