He promised to help me and then_________.

— The number of private cars is growing all the time. — Yes, I can’t believe how often we get _______ in traffic jams. 

——How do you like the set of popular science books?——Wonderful! It _____ many problems we are interested in exploring.

It is so nice to hear from her. _______, we last met more than thirty years ago. 

The pavements are designed to provide easy access for the blind to _______conveniently, which is          bound to_______ active effects on people’s opinion on the government’s performance.