Ⅰ.单句语法填空/单句改错
1．As far as I am________(concern)，only by studying hard at ordinary time can you succeed eventually.
答案： concerned
2．The man was sentenced to prison for five years because he had given________some national military secrets to the enemy.
答案： away
3．In conclusion，people around the world should be aware________the real situation of water shortage.
答案： of
4．Teenagers who drop________of high school usually have trouble finding jobs.
答案： out
