【单选题】【消耗次数：1】
I haven’t finished my composition . I ________ for two hours and a half.
①
have written it
②
have been writing it
③
wrote it
④
am writing it
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相关题目
【单选题】
I haven’t finished my composition . I________ for two hours and a half.
①
have written it
②
have been writing it
③
wrote it
④
am writing it
【单选题】
I haven’t finished my composition. I ___ for two hours and a half.
①
?have written it
②
?have been writing it
③
?wrote it
④
am writing it
【单选题】
I often ______ the cooking for my family, but recently I have been too busy to do it.
①
will do
②
do
③
am doing
④
had done
【单选题】
I have been looking forward to ____ from my parents.
①
：hear
②
：being heard
③
：be heard
④
：hearing
【单选题】
（ ） he finished writing the composition in such a short time surprised us all.
①
What
②
How
③
That
④
If
【单选题】
I am ____ grateful for the many kindnesses you have
shown my son.
①
excessively
②
much
③
certainly
④
exceedingly
【单选题】
The reason _________ I am writing this letter is to tell you about the meeting on Saturday.
①
because
②
why
③
for
④
as
【单选题】
I haven’t read ____ of his books, but judging from the one I have read I think he’s a very promising writer.
①
any
②
none
③
both
④
either
随机题目
【单选题】
在进行网络计划费用优化时，应首先将（）作为压缩持续时间的对象。
①
直接费用率最低的关键工作
②
直接费用率最低的非关键工作
③
直接费用率最高的非关键工作
④
直接费用率最高的关键工作
【单选题】
单代号网络计算总时差的过程是：（）
①
自开始结点顺箭杆方向至结束结点
②
自结束结点逆箭杆方向至开始结点
③
工作时间→节点时间→计算总时差
④
节点时间→工作时间→计算总时差
【单选题】
若工作的延误时间大于该工作的自由时差，小于总时差，说明此延误时间对后续工作有影响，对总工期（）。
①
有影响，但可不作调整
②
有影响，必须调整
③
无影响，且不需调整
④
虽无影响，但要调整