Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
In Vietnam, agriculture is the main ………. activity.
A.economically
B.economic
C.economy
D.economical

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Over the years, I have always wondered how life would be ………. the technological inventions of today.
A.except
B.without
C.excluding
D.unless

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
If you use your laptop ………., it will be your best friend.
A.wisdom
B.wise
C.wiser
D.wisely

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I _____ my assignment on modern technology yet. I am still working on it.
A.don’t finish
B.hasn’t finished
C.didn’t finish
D.haven't finished

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
They are not making much ………. with their French.
A.progress
B.progressive
C.progressively
D.progressed

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
It is easy to transfer photos from a digital camera ………. a computer.
A.to
B.on
C.until
D.up

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
There is something wrong with these headphones. I can’t hear the sounds ………. my mobile phone.
A.from
B.out of
C.through
D.with

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The company said the flying car's top speed ……….. the ground is at least 99 mph.
A.on
B.in
C.at
D.under

Trong phản ứng hóa học, các nguyên tử kim loại dễ nhường electron cho nguyên tử nguyên tố khác để trở thành
A.ion âm, gọi là cation.
B.ion dương, gọi là cation.
C.ion âm, gọi là anion.
D.ion dương, gọi là anion.

Cho dãy các ion: $ A{{l}^{3+}},{{F}^{-}},{{S}^{2-}},N{{H}_{4}}^{+},O{{H}^{-}},S{{O}_{4}}^{2-} $ . Số ion đa nguyên tử trong dãy là
A.2.
B.3.
C.4.
D.5.