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
--- You have made a promise to go with me to Nanjing. So why aren’t you getting ready?--- But I ________ that you wanted me to start at once.
#100573
A
haven’t realized
B
hadn’t realized
C
didn’t realize
D
don’t realize
．The news came as no surprise to me. I ______ for some time that I would fail in the exam.
#103482
A
had known
B
knew
C
have known
D
know
—Why? Where is the key to the meeting room? —Dear me! You ______ it in the taxi!
#104446
A
had never left
B
didn’t leave
C
never left
D
haven’t left
—-Look at the timetable. Hurry up! Flight 4062 ______off at 18:20. — I will.
#101703
A
takes
B
took
C
will take
D
has taken
—What were you doing when Lucy ________in yesterday?—I had just finished my homework and ________to take a shower.
#99419
A
dropping；start
B
had dropped；started
C
dropped；have started
D
dropped；was starting