Great as Newton was, many of his ideas _______ today and are being modified by the work of scientists of our time.
#102473
A
are to challenge
B
may be challenged
C
have been challenged
D
are challenging
推荐题目
In order to find the missing child, villagers _______ all they can over the past five hours.
#100499
A
did
B
do
C
had done
D
have been doing
I _______ to help you but I was not able to spare any time.I _______ a paper last night and I'll have to finish it today.
#104536
A
wanted; have been writing
B
have wanted;wrote
C
had wanted; wrote
D
had wanted;was writing
--Our English teacher is back home from Britain now.--Yes, she _____there for just three months.
#100924
A
has been
B
had been
C
is
D
was
―What were you doing when I called you yesterday afternoon?―I ________ my homework and I was starting to take a bath.
#104498
A
had just finished
B
was finished
C
have already finished
D
was going to finish