HOC24
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Tuyển Cộng tác viên Hoc24 nhiệm kì 29 tại đây: https://forms.gle/4ZVAZTFbqXyEn2M2A
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
If Martin were here now, he _______ us to solve this difficult problem
A. would help
B. will help
C. has helped
D. helps