After a heated discussion, we suggested the customer _______ the product back for repairs.
#87785
A
to send
B
send
C
sends
D
sent
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It’s a shame ______ able to give them any advice.  
#87215
A
not to have been
B
to have not been
C
to have been not
D
to not have been
— What great trouble I have solving this problem now!    —_____ my advice, you ________less trouble.
#90238
A
If you had taken, would have had
B
If you took, would have
C
If you had taken, would have
D
If you take, will have
________ Anirban  Maitra, a professor at Oxford University, Jack’s success would not have been possible.
#86793
A
If it weren’t for
B
Were it not for
C
Had it not been for
D
If it hasn’t been for