In September 2008,China’s key milestone in space travel _____when Zhai Zhigang conducted the first space walk.
#104025
A
reached
B
was reached
C
has reached
D
had been reached
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I have been working here since I _______ this new position.
#101688
A
offered
B
have offered
C
was offered
D
had been offered
--How did he get infected? --She ____the viruses without any protection.
#101629
A
exposed to
B
had exposed to
C
was exposed to
D
had been exposed
(2013·高考山东卷)—Oh no! We’re too late.The train ________.—That’s OK.We’ll catch the next train to London.
#99704
A
was leaving
B
had left
C
has left
D
has been leaving
I must be off now. My friends ________ outside.
#101413
A
wait
B
have waited
C
were waiting
D
are waiting
With more forests being destroyed, huge quantities of good earth __________ each year, which __________ that our environment is suffering.
#101375
A
are washing away, suggest
B
is being washed away, suggest
C
have been washed away, suggests
D
are being washed away, suggests