1 . 看到如此艰难的条件，一度想离开的念头在他的脑海闪过。
Seeing the tough situation, the thought of leaving ______ ______his mind.

2 . 由于学习压力过大，他晚上很难入睡.
______ ______great stress form his study, he can't fall sleep at night.

3 . We were greatly ________（激励）by the speech given by President Xi at the grand celebration and determined to study harder to contribute to our nation. (根据汉语提示单词拼写）