On his way to the airport,it ________him all of a sudden that he had forgotten his passport. 
#70418
A
hit
B
knocked
C
occurred
D
beat
推荐题目
Burglar alarms ________ at any time of the day or night serve only to annoy.
#67754
A
go off
B
that are going of
C
that go off
D
which going off
 Most people are familiar with the idea that all matter in the universe ________ atoms.
#74573
A
makes up
B
makes up of
C
consists in
D
consists of
The primary purpose is to _____ those achievements in biological research _____ the public. 
#71353
A
make; known by
B
make; known to
C
make; know to
D
make; knowing by