1.We found _____ very difficult to learn Japanese.
问题描述：
1.We found _____ very difficult to learn Japanese.
A.this B.that C.it D.its
2.The days in winter are shorter than _______ in summer.
A.that B.one C.those D.these
答
B 我们发现学习日语很有趣,学习日语这件事用THAT 代替
B one 代替前面提到的白天.为了不重复出现