The sales _______________ even further in the fifth week
drop/fall/decrease
we found that the sales _______________ further into the third week
increase/rise
The sales ______ from the first week to the third.
are going up
The sales ____ from 6th week to 8th week.
fluctuate
The sales ____ from 5th week to 6th week
remain constant
The sales _______________ in the twelfth week.
reach a peak
If you look at the graph, the sales _______________ from the first week to the second week
increase/rise
but the sales _______________ in the fourth week
decrease/drop/fall
However, the sales ______ from the third week to the fifth.
are going down