If the customer service center conducted a survey on the ...

★ Subject Verb Agreement & Subjunctive Mood

If the customer service center conducted a survey on the new design, it … helpful to understand both the good and bad points of the design.

A. was

B. is

C. would be

D. will be

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… you signed up for the workshops online, you would have received a 15 percent discount.

A. If

B. Have

C. Because

D. Had