It is worth considering what makes “convenience” foods so popular, and ____ better ones of your own.
#97853
A
introduces
B
to introduce
C
introducing
D
introduced
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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