The United Kingdom of Great Britain ______ three main parts England, Scotland and Wales.

Leaves are found _______ all kinds of trees, but they differ greatly ______ size and shape.[ ]

I was tired out that evening, I _____ from falling asleep by the great pain in my knee.

My trousersbeing washed.What’s worse，this pair of trousers bought yesterdaytoo short for me.

The professor spoke so fast during thelecture that we couldn’t _____ what he said.