Luyện tập Part 6

1.

explain
construct
upgrade
notice

2.

demands
controls
interruptions
requirements

3.

occur
occurred
occurring
will occur

4.

performance
selection
completion
decision

5.

effective
effects
effectiveness
effect

6.

forms
suppliers
benefits
directions

7.

spontaneously
increasingly
solely
barely

8.

unprepared
anonymous
elementary
obvious

9.

change
depart
separate
return

10.

cancel
canceling
cancellation
to cancel

11.

fair
acquainted
honest
pleased

12.

terminate
review
maintain
alter

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