- A

一杯牛奶a glass of milk - B

一个人在骑自行车a person riding a bicycle - C

一个女孩在洗衣服a girl washing clothes - D

小狗a little dog - E

一块西瓜a slice of watermelon - F

一个女人在打电话a woman making a phone call
해설
Step 1: find the main verb phrase – “洗衣服” (wash clothes). Step 2: scan the six pictures; only C shows someone washing clothes, so the answer is C. “每个星期六” (every Saturday) and “在家” (at home) are just time and place, which the picture does not need to show. F also shows a woman, but she is on the phone, not washing. Tip: underline the verb + object first and do not let the subject “妹妹” mislead you.
해설
The sentence has two parts: “天气太热了” (it is too hot) and the suggestion “吃点儿西瓜吧” (let's have some watermelon). What can be drawn is the “西瓜” (watermelon), so the answer is E. A, the glass of milk, is also food and drink, but “牛奶” is not mentioned. When a sentence gives a reason plus an action, pick the picture by the concrete action or object. Final “吧” marks a suggestion.
해설
Two drinks appear: “咖啡” (coffee) and “牛奶” (milk), but coffee follows “不喝” (don't drink). What the speaker actually drinks is “喜欢喝牛奶” (likes drinking milk), so the answer is A, the glass of milk. This bank has no coffee picture, but real papers often do – that is the negation trap. Always check which noun “不/没” goes with.
해설
The key phrase is “打电话” (make a phone call): the person is calling someone. F shows a woman on the phone, so the answer is F. “说了一个小时了” (has been talking for an hour) only tells us how long the call is. C also shows a girl, but she is washing clothes, not holding a phone. “给 + person + 打电话” means to phone someone.
해설
The sentence is about “我家的小狗” (our little dog), named “小白”, who likes “和孩子们一起玩儿” (playing with the children). D shows a little dog, so the answer is D. “它” is the pronoun for animals. B (a person riding a bicycle) matches no sentence: it is the extra picture in this set. Tip: once all five are done, the picture left over is the extra one – check that no sentence mentions it.