A.It is challenging.
B.It is interesting.
C.It is useful.
D.It is difficult.

A.She dislikes the food she eats.
B.She is unable to sleep well.
C.She finds the rent high.
D.She has no chance to make friends.
A.To try to make more friends.
B.To try to change accommodation.
C.To spend more time on English.
D.To stop attending language classes.
A.it is an anniversary of the internet.
B.many people are surfing the net on that day.
C.the net brought about no changes until that day.
D.big changes will take place on that day.