We offered him our congratulations ____ his passing the college entrance exams.
“We can’t go out in this weather,”said Bob, out of the window.
I was really anxious about you. You________home without a word.
____ from his appearance, he must be from the north.
Our town has dozens of factories, ____ several sawmills.
What should the people do to solve the food problem if they live in hilly areas ____ is hard to grow crops?