问题
I think _______ is really difficult for us to work out this kind of math problem.
A:it
B:this
C:that
D:one;
B:this
C:that
D:one;
正确答案是：
同类题型
Amy makes fewer mistakes than Frank.She does her homework ________.
I’m leaving for Hainan on holiday this afternoonAt this time tomorrow, I _____ on the beach
Is Kobe Bryant________ American basketball player—Yes. He’s from Pennsylvania (宾夕法尼亚州)．
She brought with her three friends, none of ________ I had ever met before.