Jack is good, kind, hard-working and intelligent_____, I can’t speak too highly of him

The ability to make and use tools is one of the most basic characteristics of __________ it means to be human.

When I speak in front of the class, I am very stressed out.

I think it is a very interesting book is well worth reading, I have never read before

Do you know about a very popular toy— the yo-yo(悠悠球)—Yes. Filipinos(菲律宾人) invented it ________ accident. And it ________ helping kill animals.