81. These drugs are called ________________ They calm people down, but can be dangerous if taken for long periods of time. TRANQUIL

82.  How wonderful! The technical bits of the security system all worked _______________. FAULT

83.   Leading _______________ of the proposed cuts in defence spending will meet later today. OPPOSE

]84.  I’m afraid the swimming pool is closed at the moment as they’re carrying out some essential ___________________. MAINTAIN

85.   _______________ readers are going to struggle with this book and would be better off starting with an introductory text. KNOW

86. The president said NATO _______________ will finally erase the boundary line in Europe artificially created by the Cold War. EXPAND

87.  A: Clothes made from natural fibres are better for your skin. 

B: Is that plant real or _______________? ARTIFICE

88.   I’m trying to be more _______________ with my cooking. ADVENTURE

89.  He can’t give up teaching, because it’s his ___________________ source of income. PRINCIPLE