Space exploration began in the 1960s, and since then about five hundred people into space.
#101989
A
have traveled
B
traveled
C
had traveled
D
are traveling
推荐题目
Our team was ahead during the first half, but we ________ in the last ten minutes.
#104509
A
had lost
B
would lose
C
were losing
D
lost
Stay awake! You should know that it ________ to sleep in class.
#100994
A
doesn’t permit
B
is not permitted
C
will not be permitted
D
was not permitted
She ______ someone, so I nodded to her and went away.
#99079
A
phoned
B
had phoned
C
was phoning
D
has phoned
Do you know when the Great Wall _________?
#101773
A
was come into being
B
came into being
C
had come into being
D
had been come into being
Mr. Lee, who _______ as a carpenter for over 10 years, is now a very famous statesman in this country.
#102270
A
has worked
B
had worked
C
worked
D
works