The newly-built bridge ________the beauty of the city.
| A．adds up to |
| B．adds to |
| C．adds up |
| D．is added to |
In recent days ,with the help of our teacher , I have made ___ great progress in _____mathematics.
| A．a; the | B．/ ;/ | C．/ ; the | D．a ; / |
Mrs. Green always helps her mother even though going to work _________most of her day.
| A．takes out | B．takes down | C．takes up | D．takes off |
We have to admit that the biggest___________ facing the ecosystem is limited resources and the worsening environment.
| A．mission | B．challenge | C．scale | D．contribution |
Your task will be to examine the___________ of constructing a new factory in the United Kingdom.
| A．motivation | B．appointment | C．adjustment | D．possibility |
His friends were ___________and encouraged him to publish his ideas, but Copernicus was cautious.
| A．technical | B．official | C．educated | D．enthusiastic |