The mausoleum is ................. by Thien Thu mountain, two towering columns and a vast expanse of water.

Put plants ............... a window so that they will get enough light.

Employers often require that candidates have not only a degree .............

Richard Nixon had been a lawyer and ............... before he entered politics.

If one of the participants in a conversation wonders ............... no real communication has taken place.

The salary of a bus driver is much higher ................

Professional people expect ............... when it is necessary to cancel an appointment.

Sedimentary rocks are formed below the surface of the earth ............... very high temperatures and pressures.

Farmers look forward to ............... every summer.

Clipper ships were the swiftest sailing ships that …………………. to sea and the most beautiful.