In the past decades, sea ice ______ in the Arctic as a result of global warming.
| A．had melted | B．has been melting | C．melted | D．is melting |
. The breakdown of the machine brought the work into a mess.
| A．relevant | B．academic | C．abrupt | D．absurd |
Hangzhou is distinguished its beautiful scenery.
| A．as | B．for | C．in | D．by |
. Don’t let yourself be by a small failure in the experiment Try again.
| A．turned down | B．cast down | C．put down | D．made down |
______________food are needed.
| A．Quantities of | B．Mass of | C．A large amount of | D．Lots of |
Many young people in the west are expected to leave could be life’s most important decision—marriage— almost entirely to luck.
| A．as | B．that | C．which | D．what |