The new technology, if       to rice growing, will help increase the grain output．
A．a(chǎn)pplyingB．a(chǎn)ppliedC．to applyD．having applied
B

試題分析：句意：如果被應(yīng)用于水稻種植，這個新科技將幫助增加谷類的產(chǎn)量。這里是if條件句的省略式，完整的是If the new technology is applied to rice growing，如果主從句的主語一致的時候，可以省略從句的主語和be動詞，所以選B。
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