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。 |
The foreigners are ______ by the ________ progress that the Chinese have made.
| A．amazing…amazing | B．amazed…amazed |
| C．amazed…amazing | D．amazing…amazed |
The summer holidays are not far away _________ we can stay at home and read some good books.
| A．where | B．when | C．why | D．in that |
The classroom can ________ 50 students.
| A．sit | B．sat | C．seat | D．seats |
Football, ________ is an interesting game, is played all over the world.
| A．that | B．which | C．it | D．who |
He _______ two elder brothers and a younger sister.
| A．is having | B．has | C．have | D．was having |