The US was the first country _______ the new strange disease in 1981. [ ]

____ does your father work—He works in a hospital.

ently read that it’s good to walk a lot; ______, I’m getting off the bus a few stops early and walking the rest of the way.

Sam is doing some _______ about the ancient Silk Road.

My new CD player has gone wrong twice this week.—Return it to the shop. I bet it isn’t ______ standard.