Các loại chùm sáng thường gặp là:

A.Chùm sáng song song

B.Chùm sáng phân kì

C.Chùm sáng hội tụ

D.Tất cả các chùm sáng trên

                Christmas is a holiday when people get together with family. People give presents to each other or send cards wishing each other a marry Christmas. At Christmas, people decorate Christmas tree and put up lights around the house. A common Christmas dinner is turkey. There are also lots of baked goodies for the kids. Christmas begins on the day before Christmas, or Christmas Eve and continues until Boxing Day, when many people go shopping for sales.

1.      People usually spend Christmas with their family                 ……………………

2.      People send Christmas greeting to each other                         ……………………

3.      People put up Christmas trees around the house                    ……………………

4.      Many people go shopping on Christmas Eve                             ……………………

1.      The dress is very expensive.

 What      

2.      The car is very new.

What

3.      He loves working on the farm.

 What

I. Pronunciation

1. A. learns                              B. plays                                   C. drinks                                 D. begins

2. A. invites                             B. practices                             C. watches                              D. washes

3. A. fixes                               B. scores                                  C. decides                               D. gives

4. A. girls                                B. friends                                C. stamps                                D. boys

5. A. nurses                 B. watches                  C. babies                                 D. dishes
6. A. fine               B. nine                         C. time                        D. thing

Khi đo độ pH của đất giấy quỳ chuyển sang màu đỏ là đất gì?