_____time goes by, my grandfather’s memory seems to get worse and worse.
| A．Though | B．As | C．Because | D．Since |
___ staying at hotels in Red River Village, tourists can help the villagers make money so that they can take _____the river and the birds.
| A．By; care for | B．By; care of |
| C．Through; care about | D．With; care of |
Paul started hiking in 2010 and he has hiked across 11 countries __________.
| A．ever since | B．from then on | C．right away | D．at once |
Saving money is ________ we must do.
| A．what that | B．anything that | C．something that | D．something which |
_______is no good always complaining about life. At least, we are living.
| A．It | B．There | C．This | D．That |
Helen listened carefully _________ she might discover exactly what John wanted.
| A．so as that | B．in order that | C．in order to | D．so as to |