Is the weapon efficient? – Yes, it is a(n) one. extremely
sharply
deadly
costly

ответ  deadly

Объяснение:

deadly

Is the weapon efficient?-Yes,it is a costly

1) i'm a happy owner of my own house.2)i built it myself.

3)my house is a very big mansion.

4)it's a modern house.

i'm trying to find ways to keep myself from being bored.

1)are you  trying to find ways to keep yourself from being bored? общий

2)who is  trying to find ways to keep yourself from being bored? специальный

3)are you  trying to find ways to keep yourself from being bored or fall into it? альтернативн.

4)you are  trying to find ways to keep yourself from being bored, aren't you? разделительный