Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The ………., which can travel underwater, imitates a dolphin’s shape.
A.submarine
B.boat
C.ferry
D.ship

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The potato is an extremely ………. vegetable. It has many different uses.
A.convenient
B.versatile
C.economical
D.flexible

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Electric buses are a clean and ………. way to travel.
A.portable
B.easy to carry
C.environmentally-friendly
D.easy to use

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Technological ………. has been so rapid over the last few years.
A.knowledge
B.machinery
C.equipment
D.progress

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
We are ………. material on the Internet for a project at school.
A.researching
B.surfing
C.discovering
D.releasing

Điền số thích hợp vào ô trống:
 
 
1m$^2$ =  cm$^2$
A.100000
B.
C.
D.

Điền số thích hợp vào ô trống:
 
 
1m$^2$5dm$^2$ =  cm$^2$
A.10500
B.
C.
D.

So sánh:
 
 
30500cm$^2$   3m$^2$5dm$^2$
A.=
B.
C.
D.

Chọn đáp án đúng
Năm nghìn năm trăm linh năm mét vuông được viết là:
5505m2
5550m$^2$
5505m$^2$
A.answer3
B.
C.
D.

Điền số thích hợp vào chỗ chấm
$ 640000c{{m}^{2}}=....{{m}^{2}} $
A. $ 6400 $ .
B. $ 604 $ .
C. $ 64000 $ .
D. $ 64 $ .