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
An unemployed Iranian man threw his shoes at President Mahmoud Ahmadinejad while the leader________ a speech.
#99158
A
delivered
B
was delivering
C
would deliver
D
had delivered
The car ran down the hill, and the driver _____, according to the newspaper, to have been killed.
#103554
A
said
B
was saying
C
was said
D
had been said
---I’m sure Andrew will win the first prize in the final. ---I think so. He _____ for it months.
#101313
A
is preparing
B
has been preparing
C
was preparing
D
had been preparing
An emergency meeting will be held tomorrow, at which the bill ________ to pass.
#100292
A
is expected
B
will be expected
C
expects
D
will expect
Ladies and gentlemen, please fasten your seat belts. The plane .
#101851
A
takes off
B
is taking off
C
has taken off
D
took off