The phrase "activity will begin" is correct and usable in written English.
It can be used to indicate the start of an event or process.
Example: "The scheduled activity will begin promptly at 10 AM, so please arrive on time."
Alternatives: "the event will start" or "the session will commence."
"We cannot speculate on how soon drilling activity will begin.
Her fresh burst of activity will begin the day after Labor Day, when daughters Malia and Sasha return to school.
The committee anticipates that a gradual recovery in economic activity will begin later this year, but the downside risks to that outlook are significant.
It seems likely that a new wave of Kinect hacking activity will begin as soon as the new device becomes available.
Still, the Conference Board said its index, which is meant to project economic activity in the next three to six months, suggests the recession has bottomed out and growth in economic activity will begin soon.
"Probably by the end of 2010 we'll have 10 to 20 retailers up and running," said Frank Riso, a senior director at Motorola, adding that most of the activity will begin in 2011.
These activities will begin at 11 30 P.M. at Grand Army Plaza, at the intersection of Eastern Parkway, Flatbush Avenue and Prospect Park.
In just a few weeks, the whirlwind of start-of-semester activities will begin.
The activities will begin each day at 10 A.M. and continue past sundown, when cannons will be fired.
Commencement activities will begin at 9 45 am with the academic procession from 77 Massachusetts Avenue to Killian Court via Memorial Drive.
Patriotic Reading and Music at John Jay Homestead Monday's activities will begin at 11 a.m. with a free reading of the Declaration of Independence on the front lawn, with music by the American Colonials fife and drum band; spectators are encouraged to provide their own seating.
