37. All animals, ______ their size, breathe once for every four heartbeats.
According to the data, China supplies more than 90 percent of the world’s rare earth metals, but its reserves only about one third of the world’s total.
— Let’s Football World tonight, Frank. Okay? Just this once! — Let me guess. You want to watch the History Channel, don’t you?
—Shall Tom go and play football? —Not unless he ______ his homework.
There is no doubt that the official was very weak-willed, otherwise he .
Helen didn’t mention anything about the dinner over the phone; she seemed about our appointment.