Việc đổ ngập nước và đậy kín ngăn cho khí O₂ không vào trong được, quá trình hô hấp của các VSV không diễn ra hoặc gặp bất lợi => Quá trình lên men mới được diễn ra

Đổ ngập nước và đậy kín để không có oxy cho vi khuẩn lactic phát triển đồng thời cũng ức chế các vi sinh vật gaay thối rữa hoặc là nấm mốc khác cần oxy để sống

because it in ezzzzz

1 We provided support for Nepal after the earthquake in 2015

2 Jane Austen started writting her first novel when she was 20

Question 1: Mrs. Kim didn't let Lucy adopt a pet until she was ten. (allow)

Mrs Kim didn't allow Lucy to adopt a pet until she was ten

Question 2: How long has Sam been attending art classes? (When)

When did San attend art classes?

Question 3: “Are you nervous about your upcoming job interview?” Tom asked me. (if) (Use reported speech)  

Tom asked me if I was nervous about my upcoming job interview

Lời giải:
ĐKXĐ: $x\geq 7$ và $x\geq m$

Để TXĐ là $D=[7;+\infty)$ thì m\leq 7$

1  A. invention              B.computer     C.holiday     D. detective

2  A. internet                B.attention         C.invention      D.advantage

3   A.average                  B.document         C.computer        D.everything

4  A. grandfather           B.afternoon         C.library             D.photograph

5  A.favourite                 B.tradition      C.family                D.exercise

6   A.banana                B.january        C.century              D.syllable

7     A.volunteer            B.engineer           C.vietnamese        D.holiday

8   A.opinion               B. energy                C.customer         D.telephone

1. Yes, I have contributed to charity by donating money
2. To help people in my community, I can engage in volunteer work, support local initiatives, and participate in community projects
3. Some benefits of volunteering activities include personal fulfillment, skill development, building a sense of community, and making a positive impact on others' lives
4. The most useful invention in my house is the refrigerator, as it helps preserve food and keeps it fresh for a longer time
5. I use my mobile phone for various purposes, including communication, browsing the internet, taking photos, and managing my schedule
6. Yes, the Internet is important in my daily life for tasks such as information gathering, communication, work, and entertainment