x ( pl x's or xs ) noun , X ( pl X's or Xs ) noun [eks] 1. [letter] x f inv, X f inv 2. [unknown quantity] equis f inv x number of ... un número equis de ... 3. [in algebra, to mark spot] x f 4. [at end of letter] besos X noun [unknown name] Mr X el señor X
Complétez la séquence avec la proposition qui convient. I liked … of the books. They were boring. neither either both