When you stand on the top of the mountain and overlook the surrounding scenery, you will find it is ______ to climb it up with effort.
______ the illness pneumonia, Jackson couldn’t go on teaching.
It’s already 9:00 and Lucy is ______ for us there.
—Hi, Li Ming. Where are you going? —Oh, it’s you—Xiaohui. I ______ you.
The doctor ______ you for your cough is sure to _____ it.
It’s his laziness that ________ his failure in the last exam.