My brother is studying in ______ university in America; he wants to be ______ astronaut in the future.

After a series of food safety incidents, the government has ______ that not enough has been done to guarantee people green and healthy food.

Did it _______ you 4 hours to get to Shanghai last week?—Yes, just 4 hours by bus.

What’s your speech _______, Dr. Smith?—Tomorrow you will get it. [ ]

_____is it from your home to school?—Three miles.[ ]