Do your wear Eyeglasses? Contact Culler Solutions Today!
In June, Culler Solutions will be conducting a consumer study on behalf of Optometrica 21. To this end, we are 139. ----- eyeglass wearers between ages of 21 and 65. Participants must have a prescription that is less than two years old 140. ----- the start of the study. 141.-----.
Interested individuals are requested to fill out a short survey at cullersolutions.com/eyeglass study. Qualified applications will be contacted by a member of our staff. Upon completion of the study, each participant 142. ----- a gift card valued at $100.
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Giải thích
Căn cứ vào ngữ cảnh và dịch nghĩa của câu, vào thời điểm bắt đầu nghiên cứu nên chọn at
the start of
đáp án C