In the last few hours they … their research.
A.dicussed
B.have discussed
C.are discussing
D.have been discuss

I have known him … we were at grade 6.
A.for
B.as
C.since
D.when

Choose the underlined part that needs correction.We were discussing (A) the project (B) while (C) the lecture came in (D).
A.the project (B)
B.were discussing (A)
C.came in (D)
D.while (C)

She is a (A) well-known author, and (B) she has been writing (C) twelve novels so far (D).
A.and (B)
B.so far (D)
C.a (A)
D.has been writing (C)

The prices (A) of (B) electronic devices have gone down dramatically (C) late (D).
A.of (B)
B.The prices (A)
C.late (D)
D.dramatically (C)

Since I … to the town, I … home.
A.will move / will not returned
B.moved / have not returned
C.have moved / was not returning
D.move / am not returning

… the firemen arrived to help, we had already put out the fire.
A.Until
B.By the time
C.After
D.No sooner

I have been interested in wildlife animals … I was seven.
A.since
B.while
C.when
D.as soon as

… I visit him, we talk about politics a lot.
A.As far as
B.Whenever
C.Until
D.Up to

I flew for the first time last year … I went to Brazil.
A.till
B.until
C.as
D.no sooner