The first mobile phones were heavy and ______ to use, but nowadays they are much easi

A. mobile

B. migrant

C. flowing

D. wandering

In order to make things convenient for the people, the department is planning to set up some shops in the residential area.

A) flowing B) mobile C) drifting D) Unstable

It was the first time that such a had to be taken at a British nuclear power station.

A) presentation B) preparation C) prediction D) precaution

A.on

B.in

C.at

D./

First published in 1927, the charts remain an source for researchers.

A) intelligent B) indispensable C) inevitable D) identical

First published in 1927, the charts remain an ______ source for researchers.

A) identical B) indispensable C) intelligent D) inevitable

Before the first non-stop flight made in 1949, it ________ necessary for all planes to land for refueling.

A) would be B) has been

C) had been D) would have been

A.TOP

B.LIMIT

C.FIRST

D.ROWNUM

A.the Song Dynasty

B.the Qin Dynasty

C.the Ming Dynasty

D.the Qing Dynasty

m of pollution in the country, but halfway in her speech, she suddenly _________ to another subject.

A) committed B) switched

C) favoured D) transmitted