Sometimes to get out of difficulty, one must change his way of thinking, or simply change his ____ towards a problem.
The teacher set such difficult problems ______ nobody could work out _____ none of us passed the test.
The doctor insisted that the patient_______seriously ill and that an operation_______in no time.
It _____ every day so far this month. I can’t tell you if it _____ tomorrow.
The most crowded part in a city is usually the city center, ______ many shopping malls and office buildings.
Although his present wasn’t worth too much, I still appreciated it very much. In my view, it’s the thought that ______.