1. It takes 9 minutes. Beat the eggs when the pan is hot, cut the onions when the oil is hot, then scramble the eggs and wash the pan. ***2+ 1+4+2=9 minutes.

2. Matching length is 3, and each matching length is 1+ 1+ 1=3.

4 kinds, every three people take a group photo, and one person will not take a group photo. There are four possibilities.

Six kinds, every two people talk on the phone, assuming there are four people, there are six kinds: A, B, C, A, D, B, D, C.

Eating is the same as playing table tennis. There are three kinds.

Take three methods, namely 7-angle, 6-angle and 3-angle.

two

Sausage and roast chicken, sausage and cake, sausage and salad oil, roast chicken and cake.

three

Two kinds 1

Hat socks scarf 2

Hat, socks and gloves

four

I don't quite understand the meaning of this question.

five

Choose vegetables when the pan is hot, wash and cut vegetables when the oil is hot, and wash the pan for cooking, ***2+4+2+4= 12 minutes.