Each time, Billy Crystal performs his stand-up routine in front of millions of people when the show is broadcast _______ on TV.

Women _______ drink more than two cups ofcoffee a day have a greater chance of having heart disease than those______ don’t.

I just wonder ____ that makes him so excited

There are so many new words in the passage thatI could hardly make any ________ of it.

Evidence of a powerful volcano, which erupted under the ice sheet of West Antarctica around 325BC and might still be active now, __________ so far by British scientists.