A：AB=A′B′，AC=A′C，∠B=∠B′
B：AB=A′B′，BC=B′C，∠A=∠A′
C：AC=A′C′，BC=B′C′，∠C=∠C′
D：AC=A′C′，BC=B′C′，∠B=∠B′
体育运动会导致体内需氧量增加，不利于身体健康。（判断对错）
Helen and Bob are working hard these days because they will put ______ a short play in the school Talent(才艺) show.
You can improve your English_______practicing more.
