With the help of high technology, more and more new substances ______ in the past years.
#104082
A
discovered
B
have discovered
C
had been discovered
D
have been discovered
推荐题目
－Linda, the phone in your office can’t be connected all the time. Why?－Oh, sorry, Miss Miles. The service ___ since last Wednesday.
#99959
A
has been stopped
B
is stopped
C
was stopped
D
had been stopped
(2013·高考重庆卷)A Midsummer Night’s Dream________at the Theatre Royal on 19th June，and then tours throughout Scotland.
#99706
A
opens
B
is opened
C
will open
D
will be opened
It is the first time that I ＿＿＿ this kind of moon cake.
#101854
A
enjoyed
B
have enjoyed
C
enjoy
D
enjoying
Please give Jim the schedule for tomorrow's conference when he _______ back. He is to chairthe conference.
#100046
A
will come
B
came
C
comes
D
is coming