They ___________ the echoes, how the waves bounce back.
A. understand
B. analyze
C. dispose
D. spread
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His desk is covered with ___________ gadgetry.
A. electronic
B. clear
C. dynamic
D. requirement
This function allows you to cut and ___________ text.
A. Ignite
B. enlarge
C. paste
D. delete
These ___________ are not very meaningful.
A. write
B. statistical
C. statistics
D. delete
I realized I had to surmount the language barrier( ).
A. barrier
B. barrel
C. barren
D. barrage