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Optimal design of lesson 20 in the second volume of grade four
First, open the childish side of duckweed in motorboat.

Second, stealing white lotus to duckweed, sitting on the edge of raspberry moss, should not scare the fish.

Third, the solution: know, understand.

One: refers to the trace left by duckweed after crossing the boat, which is difficult to close for a while.

Distant: distant: response.

Fourth, secretly pick white lotus by boat; I don't know how to hide my whereabouts. I calmly rushed away from duckweed and came back with a boat. I saw the duckweed separated behind me and couldn't close it for a while. Innocent and lovely