Who ________ a theory about black holes?
#68666
A
put forward
B
put down
C
put away
D
put off
推荐题目
The line is engaged. I can’t _____ now.
#78489
A
get on
B
get along
C
get through
D
get down
Several diseases are believed to ______ the lives of many children annually, malaria _______. 
#71381
A
claim, included
B
kill, to be included
C
be claiming, is included
D
be killing, included