15. Great changes ______ in the city, and a lot of new buildings ______.
| A．have been taken place; have been set up | B．have taken place; have been set up |
| C．have taken place; have set up | D．were taken place; were set up |
The rise in wood fuel use has _____ the disappearance of forest and the loss of habitats for pandas.
| A．belonged to | B．adapted to | C．devoted to | D．contributed to |
----Tom, you do the cleaning after school, ________ you?
---- Me again? But I did the cleaning yesterday!
| A．do | B．don’t | C．will | D．did |
Stand over there, ___ you’ll be able to see the oil painting better.
| A．and | B．till | C．but | D．or |
Never before in China __________ so carefully concerned about the food safety.
| A．people have been | B．have people been | C．are people | D．people are |
The moment I will never forget is _____ my parents discussed my new school life with me before the new term started.
| A．that | B．which | C．when | D．where |