If there       no buying and selling of animals, there      no killing in nature.  
A．is; will he B．will be; will beC．is; is D．will be; is
A
本題考查if引導(dǎo)的狀語(yǔ)從句的時(shí)態(tài)。if 意為“如果”。引導(dǎo)條件狀語(yǔ)從句，主將從現(xiàn)。故選A。
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