Choose the best answer A; B; C or D

Sửa giúp e a
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Question 18.
A: is gradually becoming the thing of the past
B: have gradually become the thing of the past
C: was gradually becoming the thing of the past
D: your work

Question 19.
A: Either work
B: their work
C: this work

Question 20.
A: making learning activities more individual
B: make learning activities more individually
C: make learning activities more individual
D: make learning activities more individual

Question 21.
A: Having been in the digital era
B: Before we are in the digital era
C: Not until we are in the digital era
D: As we are in the digital era

Question 22.
A: which allows students to interact
B: allowed students to interact

Question 23.
A: exploring the Pyramids of Giza
B: explored the Pyramids of Giza
C: to explore the Pyramids of Giza