With the help of high technology, more and more substances _________ in the past years.
#101033
A
discovered
B
have discovered
C
had been discovered
D
have been discovered
推荐题目
Cathy is taking notes of the grammatical rules in class at Sunshine School,where she_______English for a year.
#104064
A
studies
B
studied
C
is studying
D
has been studying
Every means ______ tried, yet no result ______encouraging up to now.
#103827
A
have been ...is
B
has been...has been
C
have ...has been
D
has...is
— Tom, will you attend the press meeting to be held this morning? — But I ______ anything about it.
#99852
A
wouldn’t be told
B
haven’t been told
C
haven’t told
D
am not told
--Jack! I have left my key to the office at home.-- Don’t worry. I _________ it for you. Wait a minute.
#100156
A
get
B
am going to get
C
will get
D
am getting