With a series of strange phenomena_____ , people living in the small village began to suspect that the earthquake was coming. A to happen B happening C happened D being happened
Every possible means ______to prevent the air pollution, but the sky is still not clear.
I have no _______ to the plan, so long as it would not cost too much.
Don’t use words, expressions or phrases _____ only to people with specific knowledge.
Scientists still wonder ______ cloning will help or harm us and _____ it is leading us.
After the National Entrance Examination the students will have an anxious couple of weeks _____ for the results.