This is _______key and that is _______English book.

The fridge produced by Haier is high quality and is not expensive either

Ms. Yousafzai became the youngest winner of the Nobel Peace Prize，but people doubt whether she can _________________ create systemic(系统性的) change at this young age.

It’s a good idea. But who’s going to ________the plan?-I think Tom and John will. [ ]

Would you mind if I take the seat next to you— _________. The person who was here has finished his lunch and left.