Dãy gồm các kim loại đều phản ứng với nước ở nhiệt độ thường thu được dung dịch có môi trường kiềm là:
A.Na, Fe, K
B.Be, Na, Ca
C.Na, Ba, K
D.Na, Cr, K

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
A smartphone provides a wide choice of ………..
A.entertainment
B.entertainer
C.entertaining
D.entertain

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
People use plants and trees as inspiration for their ………. inventions.
A.wonderful
B.wonder
C.wondering
D.wondered

Trong những phát biểu sau, phát biểu nào sai?
A.Ion là những phần tử mang điện.
B.Ion dương là anion, ion âm là cation.
C.Ion được hình thành do nguyên tử nhường hoặc nhận electron.
D.Có thể chia ion thành ion đơn nguyên tử và ion đa nguyên tử.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The government should spend more money ………. education.
A.at
B.on
C.in
D.for

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I have to agree that many people are becoming too dependent ………. technology.
A.from
B.on
C.in
D.at

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
A 3-D printer looks ………. an ordinary printer but a bit bigger and heavier.
A.for
B.as
C.after
D.like

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Computers are argued to have killed ………. contact between people.
A.physically
B.physican
C.physical
D.phycics

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
This device is used to ………. with numbers.
A.calculable
B.calculate
C.calculation
D.calculator

Khi có ánh sáng, cây tiến hành tổng hợp chất nào sau đây?
A.Muối khoáng.
B.Khí CO2.
C.Tinh bột.
D.Khí N2.