Water, which seems to be so simple and common, is ______ makes life possible.

You said boys were cleverer than girls. That is _____ I disagree.

---Tell me something about your adventure in the rainforest, please.---We lost our way in the forest and ___ made matters worse was ___ night began to fall.

_______ made the school proud was______ more than 90% of the students had been admitted to key universities.

Good food, good sleep, no exercise. That's ________ he gained weight.