The writer told the children that she quite a few detective stories in the last few years.

_naturally by the skin when exposed to sunlight, Vitamin D is needed for healthy bones, teeth and muscles.

The most important thing_____we should pay attention to is the first thing _____I have said.

（2012衢州）—Be quiet！The baby________in the next room．—Oh，sorry．

______ seemed surprising to us was ______   he came out first in the speaking competition.