American Indians ______ about five percent of the U.S. population.
A. fill up B. bring up C. set up D. make up
The problem of global warming is serious. ______, the sea levels have risen a little.
A. As a result B. On the contrary C. In particular D. In other words
At the beginning of class, the noise of desks ______ could be heard outside the classroom.
A. opened and closed B. to be opened and closed
C. being opened and closed D. to open and close
Yesterday morning he got up earlier than ______, for it was not a(n) ______ day.
A. common; usual B. common; ordinary C. usual; normal D. usual; ordinary
The medical reform in that country turns out to be ______ failure, but as we know, success often comes after ______ failure.
A. a; the B. a; 不填 C. a; a D. 不填; 不填
Having a trip abroad is certainly good for the old couple, but it remains ______ whether they will enjoy it.
A. to see B. to be seen C. seeing D. seen
