3.Bythe time we reach an agreement,the approvals ____.\x0d答案選B 也有的說選C\x0dPS 6.由by the time\x0d引導(dǎo)的時(shí)間狀語從句.\x0d　　注意時(shí)態(tài)的變化：在一般情況下,如果從句的謂語動詞用一般過去時(shí),主句的謂語動詞用過去完成時(shí)；如果主句的謂語動詞用一般現(xiàn)在時(shí),主句的謂語動詞用將來完成時(shí).例如：\x0d　　By the time you came back,I had finished this book.到你回來時(shí),我已經(jīng)寫完這本書了.\x0d　　By the time you come here tomorrow,I will have finished this work.你明天來這兒的時(shí)候,我將已經(jīng)完成此工作了.