【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】
关于多继承二义性描述中，错误的是（ ）
①
一个派生类的基类中都有某个同名成员，在派生类中对这个成员的访问可能出现二义性
②
解决二义性的最常用的方法就是对成员名的限定法
③
基类和派生类同时出现的同名函数，也存在二义性问题
④
一个派生类是从两个基类派生出来的，而这两个基类又有一个共同的基类，对该基类成员进行访问时，可能出现二义性。
【单选题】
以下基类中的成员函数表示纯虚函数的是（）
①
virtual void tt()=0
②
void tt(int)=0’
③
virtual void tt(int)
④
virtual void tt(int){}
【单选题】
在哪种派生方式中，派生类可以访问基类中的protected成员（ ）
①
public和private
②
public和protected
③
protected和private
④
仅protected
【单选题】
下列虚基类的声明中，正确的是（ ）
①
classvirtualB:publicA
②
virtualclassB:publicA
③
classB:publicAvirtual
④
classB:virtualpublicA
【单选题】
下面声明纯虚函数语句正确的是
①
void fun( ) =0;
②
virtual void fun( )=0;
③
virtual void fun( );
④
virtual void fun( ){ };