________ is often the case with human be
题型:选择题
问题:
________ is often the case with human beings, many animals sleep a lot when young, but sleep much less when they get older.
A.Which
B.What
C.As
D.That
________ is often the case with human beings, many animals sleep a lot when young, but sleep much less when they get older.
A.Which
B.What
C.As
D.That