=who Fill in the blanks with an appropriate conjunction

.............................. she was behaving so strangely was not clear to us

=why

18. Fill in the blanks with an appropriate conjunction 

......................... it tried very hard, the cat could not climb the tree

=though

19.Put the right conjunction

He held my hand ……………. I should fall

=lest

20. Put the right conjunction

You can go and play ............................ you return by 6 pm

=^{on condition that}

21. Find synonym "Cleavage"

=split

22. Find the right definition of "Consistency"  

=degree of compactness, firmness, or stickiness

23. What is Hardness?

=Hardness is a measure of the ease with the surface of a mineral

24. Find synonym "Property"

=attribute 

25. What is cleavage?