a word which join two sentences

house is a house which is owned by us otherwise home is a home where we can live

it is a branch of science which deals with plants and animals

what are you doing?

I am going in the lift

may is the possibility to do can is the ability to do

I don't know English

we will tell you on Friday evening

there are four types of sentences 1 assertive sentences 2 imperative sentences 3 interrogative sentences 4 exclamatory sentences

8 .after Pluto is excluded