1. Read and write.(根据图片，请用 a, an 或 some 将 Mike 看到的内容补充完整。)
There is an orange, a pear and some apples on the table.
( 1 ) There is also egg, and tomatoes on the table.
( 2 ) There is umbrella and jacket on the chair.
( 3 ) On the farm, I can see many animals. I can see horse, dog and roosters.
( 4 ) Besides (除了) these, I can also see houses and farmer.

(1) an; some
(2) an; a
(3) a; a
(4) some; a

本题考查不定冠词a、an和限定词some的用法：
1. 规则：a用于辅音音素开头的单数可数名词前，an用于元音音素开头的单数可数名词前，some用于可数名词复数或不可数名词前。
2. 逐空分析：
(1) egg是元音音素开头的单数可数名词，用an；tomatoes是可数名词复数，用some。
(2) umbrella是元音音素开头的单数可数名词，用an；jacket是辅音音素开头的单数可数名词，用a。
(3) horse和dog都是辅音音素开头的单数可数名词，都用a。
(4) houses是可数名词复数，用some；farmer是辅音音素开头的单数可数名词，用a。