Look! The boys       football under the tree.
A．playB．is playC．is playingD．a(chǎn)re playing
D
根據(jù)look 而知，說明本句子的時態(tài)為現(xiàn)在進行時，其結(jié)構(gòu)為主語+be+doing sth 故在CD之間進行選擇，而主語the boys 為復數(shù)形式，故選D
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