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I've done extensive research on this topic.

Those selected will have to face extensive medical and psychological tests.

The hirricane caused extensive damage.

extensive room service menu

Extensive reading is as important as intensive reading.

Forested wetlands are the subject of extensive USDA research.

Twice a year he sends his car in for extensive detailing.

The server farm suffered extensive breakage after the earthquake.

The day being fine, I felt amply repaid for my walk through the extensive and finely-wooded grounds, numerously stocked with deer.

The subway system in large cities like Paris and Tokyo is very extensive. It isn't extensive in Vancouver.

an extensive garden

You have an extensive periodontal disease.

Why was the damage so extensive?

the gardens at the palace are extensive; her knowledge of the mortgage-backed securities market is extensive

Another organizational feature of this Guide is that I have made extensive use of overview topics