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(gè)新科技將幫助增加谷類(lèi)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(yǔ)一致的時(shí)候，可以省略從句的主語(yǔ)和be動(dòng)詞，所以選B。
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