未知题型 No one (care about) if he (appears) at the meeting next year or not. If (it happens) he will (be made to) apologize for his careless comments.A.care aboutB.appearsC.it happensD.be made

单项选择题 激发情感导入一般( )课使用的多。A. 语文B. 数学C. 英语D. 物理

未知题型 (The age of) a geological sample can (be estimated) from the ratio of radioactive to nonradioaetive carbon (present) in the object (is examined).A.The age ofB.be estimatedC.presentD.is examined