A．能力B．努力C．运气D．任务难度成败归因理论认为，学生常将成功或失败归因于( )。……

多项选择题合作学习理论认为，在班级教学中，学生群体的组织形式有三种，即( )。

单项选择题How much ______ she looked without her glasses!

单项选择题The headmaster went to Washington ______ the first time last September.

单项选择题—______your step ,Jim, or you might fall into the water. —Oh,dear! Look where I am going.

单项选择题Does ______ matter if he can't finish the job on time

单项选择题Since our knowledge is ______ none of us can exclude the possibility of being wrong.

单项选择题Who wrote The American

单项选择题Does the TV say ______ happened in Iraq every day

单项选择题A bank is the place ______ they lend you an umbrella in fair weather and ask for it back when it begins to rain.

单项选择题______ around the Water Cube, we were then taken to see the Bird's Nest for the 2008 Olympic Games.