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(shuō)明本句子的時(shí)態(tài)為現(xiàn)在進(jìn)行時(shí)，其結(jié)構(gòu)為主語(yǔ)+be+doing sth 故在CD之間進(jìn)行選擇，而主語(yǔ)the boys 為復(fù)數(shù)形式，故選D
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