单项选择题
A.but B.so C.or D.either
The body needs fat to keep it （）the col...
单项选择题The body needs fat to keep it （）the cold during the long winter months.
A、between B、from C、for D、out
There are several ways（）we can cross the ...
单项选择题There are several ways（）we can cross the river without the help of local villagers.
A.in which B.across which C.to which D.on which
