It’s already 10 o’clock. I wonder how it ______ that she was two hours late on such a short trip.

The box is full ______ eggs. Who filled it _______ the eggs

When my parents were young, they had to ________ several miles every day to school since they had no money to buy a bike.[ ]

Please help yourself to some fish.It_________delicious.

The boys were playing football on the ground. Sandy didn’t want to ______ them.