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2. Since 2006, the number of Twitter users (constantly/increase).

a.has been constantly increasing
b.constantly increased
c.was constantly increasing
HALP PWEASE sniff sniff

2 Answers

4 votes

Answer:

a. has been constantly increasing

User Aromanarguello
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6 votes

Answer:

has been constantly increasing

Step-by-step explanation:

User Bing Jian
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