Tom nearly missed the flight ______doing too much shopping.
— What has _____ my dictionary? I can’t find it. — Don’t you forget you’ve lent it to Lucy?
_____ for the young man to spit in the subway!
Difficult _____ in practice, this new technique hasn’t been applied.
— Did you watch the sunrise of Mount Tai last weekend?— Yes. Luckily enough, when we climbed to the top of it, the thick fog began to _____ .
— Come on! Let’s go to the net bar.— What? _____ you ever want to do is going online.