问题

It is important to introduce children to healthy nutritious foods from ________ they begin to eat solids.

A:what
B:when
C:that
D:which

正确答案是：

同类题型

Some seemingly harmless blogs might become harmful when _____ on the Internet by millions of people.[ ]

Why not describe what you saw that day___? It will surely help the police to find out who were to blame for the terrible accident

Tom and Jack are in ___________.

I made this bookshelf all on ______ own.

__________ is she —She’s fine.