Zarrolou wrote:
Ratnakar wrote:
Announcing that one of its key successes had been the recent well-received beta launch, the Internet startup claimed it would introduce several new products to the web community during the next quarter.
A
its key successes had been the recent
B
its key successes has been the recently
C
its key successes is the recently
D
their key successes is the recent
E
their key successes had been the recent
A
its key successes had been the recent
B
its key successes has been the recently
C
its key successes is the recently
D
their key successes is the recent
E
their key successes had been the recent
I cannot tell you why "had been" is better than "has been" in
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