Planting apple trees is _____ interesting work, don’t you think so ?
Here we are at the science museum. Let’s _______.
I still remembered we arrived _______ that small village _______ a clear night.
— Everyone knows Canada is the second _______ country in the world. — That is, it is larger than _______ country in Asia.
— Excuse me, _______ is it from here to the World Park? — About half an hour by underground.
Amy is glad to help others _______, so we often ask her for help.