Question 13. The scientists __________on this project try to find the solutions to air pollution. A. working B. worked C. are working D. who workingQuestion 14. If Nam had passed the GCSE examination, he __________to take the entrance examination to the university. A. would have been allowed B. would have allowed C. will have allowed D. would allow Đề thi thử THPT 2021 - Tiếng Anh - GV Vũ Thị Mai Phương - Đề 27

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Question 13. The scientists __________on this project try to find the solutions to air pollution.

A. working B. worked C. are working D. who working

Question 14. If Nam had passed the GCSE examination, he __________to take the entrance examination to the university.

A. would have been allowed B. would have allowed

C. will have allowed D. would allow