It was not until the beginning of the twentieth century________to explore space.
#93086
A
did man begin
B
when man began
C
that man began
D
then man began
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There seems to be little chance___ Jack will recover from his injury in time for the race.
#92747
A
what
B
which
C
that
D
if
Little did he care about his own safety,_______he was in danger himself.
#94815
A
if
B
though
C
since
D
because
This problem is said _____ three times.
#92660
A
having discussed
B
to have been discussed
C
having been discussed
D
to have discussed
---You look unhappy, what’s happening, my son? ---I’m wondering how long it’ll be________ we come to China again.
#92424
A
since
B
when
C
before
D
after
______put great pressure on the local government to tell the truthfulness of the tiger photo as soon as possible.
#93252
A
The great loss of lives in the mine
B
The human cases of bird flu
C
The customers’ complaints
D
The questions from people especially experts