The valley was so deep that it had been ten seconds _________the stone feel off to the bottom.A since B before C when D until
______ the news, so far, has been good, there may be bad days ahead.
Do you think that bridge 2,000 meters long? It doesn’t appear___________long.
The idea for the new plan came to his mind, ______ to his experiment in the lab.
Traditionally, women in China are in red clothes on the wedding day, because red is the ______ of happiness and luck.
The road___________for vehicles is under repair. Drivers are required to take some other routes.