______ a certain doubt among the people as to the practical value of the project.

From that moment on, I have come to realize that I’m unique in the eyes of my parents and that they’ll _____ me in face of misfortunes and hardships.

Would you be so kind as to tell me _______ of the five policemen will be sent to Hong Kong

I strongly suggest the person ________ out and explain all that has happened.

Tigers wait ______ it is dark, then they go out to find their food.