64.3k views
5 votes
He has been working hard ________English *

a. on
b. in
c. at
d. for



2 Answers

4 votes
he has been working hard in English. option b
User Angel Naydenov
by
8.6k points
7 votes

Answer:

Option b.on is the correct answer.

User TchiYuan
by
8.2k points

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