In today’s fast changing and competitive world, to be able to learn faster and more effectively is not merely desirable; it is ________.
The college entrance exam is ______ important to the student, and it’s also challenging.
During that frightening war, these foreigners fought _______ us ________ the enemy.
I thought that maybe my words will play a role, but when I_______ her to give up smoking, I failed.
---- We’re leaving for Hainan the day after tomorrow. ---- Wow, have a good trip. And by the way how long ______ there?
Our headmaster plans to have his daughter ______at the best school of this city.