I used to eat a lot in the morning. However, I________ used to eating anything now because I always sleep late.

On the top of the mountain two towers built more than 500 years ago.

When asked to explain ________ made his lessons so exciting, the teacher kept silent.

________ the class done most of the work? — Yes, but the rest ___________ rather difficult

The continuous rain ______ the harvesting of the wheat crop by two months.