— Did you know any French before you arrived in Washington?— Never ______ it, actually.
Nuclear radiation is said __________ the biggest health challenge in Japanese Earthquake over the past few months.
Tom’s English is not good, so he devoted all his free time to __________ it.
To his surprise, Jack found his son _______as Santa Claus on Christmas Eve.
______ his expression, he didn’t _____the driving test.
The man kept silent in the room unless_______.