﹣The air here is much fresher than before．
﹣Exactly! We a lot of trees in the past few years．（ ）
A．plantedB．were planting
C．have plantedD．will plant
相关试题
Jenny just wondered Angela already knew about the event．（ ）
A．how soonB．how manyC．how oftenD．how much
Sorry， you can't take the dictionary away，Vicky．I it．（ ）
A．usedB．am usingC．have usedD．was using
China's efforts to stop the spread of COVID﹣19 will the world's ability to limit the harm in the near future．（ ）
A．imagineB．inventC．insistD．improve
We still know little about the Moon_________men have landed on it．（ ）
A．ifB．sinceC．althoughD．because
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