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
The milk must be preserved at this temperature until it ____.
#101024
A
will process
B
is processed
C
has processed
D
had been processed
You can’t imagine what great trouble the doctor had ______ the patient.
#103047
A
treats
B
treating
C
to treat
D
treated
— I called you at ten, but there was no reply. —Oh, that was probably when I ________ a shower.
#104755
A
am taking
B
took
C
were to take
D
was taking
Don’t leave the chairs about, or you may ______ them at night.
#99797
A
take over
B
turn over
C
come over
D
trip over
When Peter __________ the car door, he found the key left in his car. So he had to call for help.
#101045
A
opened
B
was opening
C
was to open
D
had opened