—Are you pleased with what he has done? —It couldn’t be ________ . Why didn’t he put more effort into his work?
Choosing the right dictionary depends on ______ you want to use it for.
I ________ have been more than six years old when the accident happened.
On Halloween, children in America like to _____ as ghosts to frighten people.
---I have some big news for you. You’ve been accepted as a member of our club. --- ________ That’s great!
President Obama held talks with Chinese President Hu Jintao in Beijing, _____ economic recovery, climate change and stopping the spread of nuclear weapons.