With time going by, we have come to realize that creativity is _______it takes to keep a nation highly competitive.
| A．what | B．how | C．why | D．that |
--You do a very good job in German translation!
--Thanks. I ______ German in Zhejiang University for four years!
| A．was studying | B．study | C．studied | D．had studied |
More and more rich people have promised to ______ their wealth after death to help the poor and the disabled.
| A．give away | B．give up | C．give out | D．give off |
I like getting up very early in summer. The morning air is so good ______.
| A．to be breathed | B．to breathe |
| C．breathing | D．being breathed |
He came to my class every week, but his attitude ______ he was not really interested in the subject.
| A．expressed | B．described |
| C．explained | D．suggested |
To tell ______ truth, he is at ______ loss what to do currently.
| A．/; a | B．the; / | C．the; a | D．/; / |