更多"Before the first non-stop flight ma"的相关试题:
[单项选择]Before the first non-stop flight made in 1949, it ______necessary for all planes to land for refueling.
A. would be
B. has been
C. had been
D. would have been
[单项选择]Never before（）made so great achievements in developing new technology of communication.
A. we have
B. did we
C. have we
D. do we
[单项选择]Before the first World War, female secretaries were rare because they ______.
A. wore stockings
B. were not as serious as men
C. were less efficient than men
D. would have disturbed the other office workers
[单项选择]（） the compass was first made in Chin
A. It is known to all
B. It is known that
C. We all know
D. As is known to all
[单项选择]The men who first made use of meteoritic metal were ______.
A. small isolated tribes
B. those who did not revere meteorites
C. nineteenth century scientists
D. warriors
[单项选择]（） the compass was first made in China.
A. It is known to all
B. It is known that
C. We all know
D. As is known to all
[单项选择]Before the first Apollo rocket went to the Moon, a spot for landing the lunar module was carefully chosen.
A. climate
B. latitude
C. sea
D. location
[单项选择]He talked（）he had never met me before, which made me quite embarrassed.
A. as though
B. now that
C. in case
D. only if
