Democrats in the state House of Representatives are still reeling from the Senate's surprise passage yesterday of mandatory standardized testing for all public schools. House DFLers wanted to take their time with the testing issue, but now they're feeling pressure to meet the Senate's challenge. Minnesota Public Radio's Martin Kaste reports from the Capitol: It's not just the timing of the Senate's action that's caught House DFLers off guard. They're also suprised by how close the Senate's plan is to what Governor ARne Carlson wants. The Senate legislation, introduced by DFL leader Roger Moe, would impose state-wide achievement tests for 3rd, 5th, 8th and 11th graders. The Governor likes the Senate legislation so much, he's offered to sign it immediately -- if and when the House goes