You know the boy is ____ playing the piano.

The guests arrived at ________ the same time and the host had a hard time in receiving them all[ ]

lish class, our teacher often creates anenvironment __________ we are given the opportunity to solve problemsourselves

China represents a huge opportunity to America, so it’s important for Americans to know _______ the Chinese work and think and to make strong friendships and connections with Chinese people.

Why did she spend so much time searching shop after shop only for a blouse— Oh, she was very ________ about her clothes.