【正文】
從句,和主句時(shí)態(tài)搭配應(yīng)遵循“ 主將從現(xiàn) ” 原則,即主句用一般將來時(shí), if 引導(dǎo)的從句用一般現(xiàn)在時(shí),故選 A。 單元語法聚焦四 A ( ) 廣東 Johnson won39。t answer the phone if he ________ the number. A. knew B. doesn39。t know C. will know D. didn39。t know ( )天津 We39。ll stay at home ________ it rains tomorrow. A. and B. if C. but D. so B 單元語法聚焦四 A ( )白銀 ________ you look after it carefully, this coat will keep you warm through many winters. A. If B. Unless C. Before D. So A 單元語法聚焦四