We human beings should be very careful with what we do with nature, _____power is beyond our understanding.
The school was moved out of downtown as the number of students had grown too________.
We laugh at jokes,but seldomabout how they work.
.Jenny was looking for a seat when,luckily,a man____________and left.
Some people eat with their eyes. They prefer to order whatnice.
Tired, Jim was fast asleep with his back_____a big tree.