Great as Newton was, many of his ideas_____today and are being modified by the work of scientists of our time.
#104460
A
are to challenge
B
have challenged
C
are challenging
D
have been challenged
推荐题目
John promised his doctor he ________not smoke，and he has never smoked ever since.
#101399
A
might
B
should
C
could
D
would
I had meant to meet you at the airport this morning, but I was too busy for I_______ a report.
#100705
A
wrote
B
have written
C
was writing
D
had written
----Mr. Hu, have you finished correcting the papers? ----Not yet, the papers _______. You _______ get the results from me by tomorrow.
#102709
A
are corrected; will
B
are being correcting; should
C
are being corrected; shall
D
are being corrected; would
The London 2012 Olympic Games marks the third time that London ______ the right to host the modern Olympics.
#101392
A
had had
B
has
C
had
D
has had
----We could have come here much earlier in your car. ----I agree. But it _____.
#99941
A
is repaired
B
was being repaired
C
had been repaired
D
is being repaired