下列命题中，真命题是（   ）

如图，在四边形ABCD中，∠A=90°，∠D=40°，则∠B+∠C为____．

在蝗虫的发育过程中，对农作物危害最大的时期是（   ）

Tom accumulated a grate deal of knowledge about plants and agriculture in growing strawberries, he went back to the abandoned          of spreading straw under the fruit to reduce the necessary amount of watering.

We like playing balls _______ basketball, football and tennis.