Ex1:

1. A. cover

2. A. aunt

3. C. glue

4. C. carp

5.  B. shoot

Ex2:

1. ruler               5. pencil case

2. pen                 6.calculator

3. rubber            7. book

4. school bag     8. uniform

Ex3:

Today is my first day at school. I am also very happy (1) about going to school with my best friend/ brother/ sister/... (2) in their new uniform I bring my rubber (3) to use in math as well as ∅ (4) to remove any pencil mistakes from my notebooks. I quite like English, but we have to learn lots of new vocabulary/grammar (5) in this subject. I really enjoy my daily activities. What about you? 

Ex4:

1. She's/ is a new student

2. It isn't / is not rubber

3. That 's / is my new laptop/computer

4. We're /are students

Ex 1:
1) A. Cover
2) A. Aunt
3) D. Shut 
4) C. Carp 
5) C. Shut 

Ex 2: 
1. Ruler
2. Pen
3. Rubber
4. School bag 
5. Pencil case 
6. Calculator
7. Book
8. Uniform

Ex 3: 
1. Happy / Friends
2. Great hoặc good
3. Eraser
4. (để trống)
5. Vocabulary

Ex 4: 
1. She's a new student
2. It's not an eraser
3. It's my new calculaytor
4. We are student