—I think the man over there must be Bob. -- It _______ be him. He has ______ to Australia.
—_______ do you prefer, walking or running? —I like running better.
I see Wei Han _______ English almost every morning.
I want to be a doctor when I .
Kangkang won the first place in the _______ in the school sports meet last week.
All the Chinese were _______ when they heard Liu Xiang won the first. It was really _______.