I:
Mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions.
Trả lời câu hỏi dưới đây:
On completion of the activities you will have to continue answering some questions.
Đáp án là B. On + V-ing = When + S + V ( đồng chủ ngữ với vế sau)