china has begun the one child policy so zhat it could solve this problem.为何从句中用could?这是过去式吗?如果是的话为什么要用过去式?

china has begun the one child policy so zhat it could solve this problem.是因为主现从任吗? Hardly ___ to speak when the audience interrupted hihad he begun ,has he begun ,he had begun ,he began The evening party _ .You are a little late.A.just began B.just has begun C.has just begun D.has begun just now 为什么选C Hurry up!The play ( ) for the minutes A has begun B had begun C has been on D began 292.The film ______for five minutes.A.has begun B.had begun C.has been on D.had been on The meeting ___when I got there.A has begun B has been on C had begun D had been on Mr. Herpin is one of the foreign experts who___in China.翻译l I'm afraid the meeting has begun. -Don't worry. It _______ until the bell ________. A. doesn't begin/ rings B. won't begin/ will ring start与begin都是瞬间动词吗?The film____when I got there?A：has begun B:had already started C:begun D:have already begun china has begun the one child policy so zhat it could solve this problem.为何从句中用could?这是过去式吗?如果是的话为什么要用过去式? Hurry up!the march____for ten minutes.A has begunB has been onC had begun D began the class -t-for 15 minutes.A:has begun B:has been on 请高人帮看看英语有什么错误没有,AbstractChina has begun to enter the interests of the times,and the collective interests of the game has become China's economic and social life of an important element.In recent years China's real estate The evening party _ . You are a little late.A. just began B. just has begun C. has just begun D. has begun just now just为什么放在has后面 hurry.up the play__ for ten minutes .hurry.up the play__ for ten minutes .A.has begun B.had begun C.has been on D.began When he got the cinema,the film （ )for helf an hour.A.has begun B.had begun C.has been on D.had been on the meeting ( )when Tom( )to the officeA.has begun;getB.has been on;getC.had begun;gotD.had been on;got选哪个为什么 The meeting ______by the time I got there yesterday. A. was on B. has been on C. had begun D. has begun 详细解析,谢谢 Has the match begun just intimeA.No,you are just in time for it.B.Yes,it has begun for five minutes.C.Yes,it has begun five minutes ago.请说明理由