a. — is the weather today?
— It’s rainy and cloudy.
b. — are you doing?
— I’m reading a book.
c. — are you from?
— I am from Canada.
d. — is your sister?
— She is nine years old.
e. — is your birthday?
— My birthday is April 18.
f. — pencils are there in the pencil box?
— Two.

a. How
b. What
c. Where
d. How old
e. When
f. How many

a. 根据答句“It’s rainy and cloudy.”（今天又下雨又多云），可知问句是询问天气情况，询问天气的固定句型是“How is the weather?”或“What is the weather like?”，这里问句是“— ______ is the weather today?”，所以应填“How”。
b. 根据答句“I’m reading a book.”（我正在读书），可知问句是询问正在做什么，用“What are you doing?”来提问，所以应填“What”。
c. 根据答句“I am from Canada.”（我来自加拿大），可知问句是询问来自哪里，用“Where are you from?”来提问，所以应填“Where”。
d. 根据答句“She is nine years old.”（她九岁了），可知问句是询问年龄，用“How old is...?”来提问，所以应填“How old”。
e. 根据答句“My birthday is April 18.”（我的生日是4月18日），可知问句是询问生日是什么时候，用“When is...?”来提问，所以应填“When”。
f. 根据答句“Two.”（两支），可知问句是询问铅笔盒里铅笔的数量，pencils是可数名词复数，询问可数名词数量用“How many”，所以应填“How many”。

Sunday, September 8
Dear Mum and Dad,
How are you? I am very . I live with Jenny’s . Jenny and I are in the same and the same . We often go to school by . Sometimes we ride our . Our teacher is . He is very . He teaches science and English. In Canada, there are three classes in the and two in the . We have at school. Learning English is easy for . Now I know many . I have many friends here. I’m happy every day.
I miss you.
Love,
Li Ming

well family school class bus bikes Mr. Wood kind us morning afternoon lunch me words

1. "I am very..." 后接形容词，"well" 表示身体好，符合语境。
2. "live with Jenny’s..." 后接名词，"family"（家人）合适。
3. "same..." 后接名词，"school"（学校）和 "class"（班级）符合 "in the same..." 结构，且先学校后班级。
4. "by..." 后接交通工具，"bus"（公共汽车）正确；"ride our..." 后接交通工具，"bikes"（自行车）合适。
5. "Our teacher is..." 后接人名，"Mr. Wood" 符合。
6. "He is very..." 后接形容词，"kind"（和蔼的）描述老师。
7. "teaches..." 后接宾格，"us"（我们）指李明和Jenny。
8. "three classes in the..." 和 "two in the..." 对应时间，"morning"（上午）和 "afternoon"（下午）符合。
9. "have..." at school 指 "lunch"（午餐）。
10. "for..." 后接宾格，"me"（我）指李明自己。
11. "many..." 后接名词复数，"words"（单词）符合学习英语的语境。