They studied what ______ since 2007 and found Australian electricity prices were among the highest in the developed world.
#102193
A
has happened
B
happened
C
had happened
D
has been happening
推荐题目
The Titanic, the biggest ship of its day, ____ unsinkable, but it sank on its first voyage in 1912.
#104179
A
thought
B
was thought
C
thought it
D
was thought it
--- Would you like to______ Mr. Zhang’s lecture this afternoon? --- Sorry, I have a class meeting to______.
#101133
A
attend; join
B
join; attend
C
join; take part in
D
attend; attend
My uncle _________ in Taiwan for 20 years. Now he has settled down in mainland.
#100301
A
was living
B
had lived
C
has lived
D
lived
We are confident that the environment________by our further efforts to reduce pollution. (2013·辽宁，30)
#99433
A
had been improved
B
will be improved
C
is improved
D
was improved