The trouble with such resources as coal, oil and gas ______ that they are not renewable.
#99825
A
was
B
are
C
have been
D
is
推荐题目
——Mr , Harry, we want to hear what you think about the reform being carried out in our school.——OK, I to that.
#100380
A
am coming
B
have come
C
which
D
As
I had been working on math for the whole afternoon and the numbers before my eyes.
#102156
A
swim
B
swum
C
swam
D
had swum
--Still remember the first time we met in the railway station?--Of course. You ________ for the train to Shanghai.
#100836
A
had waited
B
have waited
C
were waiting
D
waited
He____ in London for many years, but he has never regretted his final decision to move back to China.
#101064
A
lived
B
was living
C
have lived
D
had lived
I don’t really work here,I until the new assistant arrives.
#102261
A
just help out
B
have just helped out
C
am just helping out
D
will just help out