The passengers’ (乘客) families were to keep calm as soon as they heard the bad news.

With a lot of difficult problems ____, the newly -elected president is having a hard time.

Why not _______ a taxi to the zoo? It can save us a lot of time.

There are ________ students waiting in the hall, ________?

Do you think you could do without help?- __________. This is not the first time for me.