several natives advancing towardsour party, and one of them came up to us, ______ we gave some bells andglasses

Our teacher told us that light _____ much faster than sound.

This is a cheap and simple process(过程), ____ ,there are dangers.

Every year, many competitors from famous university come to the Thames to compete each other boating

It was not until the 1960s and 1970s archaeologistsmade real progress in understanding the script