There are some health problems that,when ________ in time,can become bigger ones later on.                                                         (2013·浙江,19)
#88745
A
not treated
B
not being treated
C
not to be treated
D
not having been treated
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The foreigner explained again and again but he still couldn’t make himself       .
#99011
A
understand
B
understood
C
be understood
D
understanding
_________ the meeting himself gave them a great deal of encouragement. 
#95779
A
The president will attend
B
The president to attend
C
The president attended
D
The president’s attending