【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】
下列属于牙周病的二级预防的是
①
口腔健康教育和指导
②
培养定期进行口腔检查的习惯
③
消除病变，制定相应的常规初查计划
④
采用各种药物和牙周手术方法，最大限度的治愈亚洲组织病损
【单选题】
为了保证良好的口腔健康，预防并治疗牙龈炎
①
建议您最好每隔半年定期去口腔科洁牙一次
②
建议您最好每隔8个月去口腔科洁牙一次
③
建议您最好每隔9个月去口腔科洁牙一次
④
建议您最好每1年去口腔科洁牙一次
【单选题】
窝沟封闭的非适应症()
①
窝沟深，可以插入或卡住探针
②
牙萌出达到合平面即适宜作窝沟封闭，一般是萌出后４年之内
③
乳磨牙在３－４岁，第一恒磨牙在６～７岁，第二恒磨牙在11～13岁为最适宜封闭的年龄
④
牙萌出４年以上未患龋