Present participle would be 'clipping'. Perfect participle would be 'having clipped'. Therefore, the only option left is 'past participle'.
The correct answer is D. Research shows students who are best at managing their time also have the highest-grade point averages. Studies have shown that time management is highly related to academic performance. This is turn would help students to achieve high grade point averages.
Answer:
33. My brother may travel to India soon
34. I'm sure you will love the food in Japan
35. our neighbors may not be at home this weekend
36. Can dad buy our train tickets online?
37. Can your visitors arrive on time?
She thinks that it is Romeo who has been slain, when in reality it was Tybalt.