假如你叫李华，你和笔友Jane互寄了全家的合影。Jane看了合影后来信问为什么你没有兄弟姐妹。请用英语写封100字左右的信说明情况。内容包括以下要点：
| 原因 |
1．中国人口增长过快； 2．二十世纪八十年代开始实行计划生育； 3．大部分中国家庭是独生子女。 |
| 看法 |
1．能受到好的教育； 2．父母关爱更多； 3．孤独、自私，生活能力差； 4．建议多交朋友。 |
As soon as she entered the room, the girl caught sight of the flowers _________ by her mother.
| A．buying | B．being bought | C．were bought | D．bought |
--Alice, why didn't you come yesterday?
--I _________, but I had an unexpected visitor.
| A．had | B．would | C．was going to | D．did |
--I'll be away on a business trip. Would you mind looking after my cat?
--Not at all._________.
| A．I've no time | B．I'd rather not | C．I'd like it | D．I'd be happy to |
The clock has three hands _________.
| A．at its face | B．on its face | C．from its face | D．in its face |
This kind of weather isn't fit _________ us _________.
| A．to;go | B．to;go to | C．for;go out to | D．for;to go out in |