1) when you are home,give me a call to let me know you ( )sa

1) when you are home,give me a call to let me know you ( )safely
A .are arriving B.have arried C.had arrived D .will arrive 为什么选B
2)I am calling to enquire about the position () in daily newspaper
A.advertised B.to be davertised C.advetising D.having advertised 为什么选A 可不可以写 having been advertised
3）--I am sorry ,but I do not quite follow you .Did you say you wanted to return on September 20?
---sorry,I ()myself clear .we want to return on October 20
A .had not made B.would not made C.don 't make D haven't made 为什么是d

1.用 have arrived 现在完成表达“已经”的意思
2.这里用 advertised 不仅仅是过去时,而且是“被动”语态的体现.
“被”登载在报纸中招聘启事的那个“职位”
3.对话持续中,用现在完成时表达 我“不曾”说清楚,和第一题意思一样.
过去完成时在使用时,一定是同一句话中明显有前后两个时间点,作为区隔早晚用的.
例如：He told me he really couldn't remember what he had said to her last week.
他刚告诉我他实在记不清上礼拜到底跟她说了什么话.
别忘了采纳哦 ...