Years ago we didn't know this, but recent science study ________that people who don't sleep well soon get ill.
#100471
A
showed
B
will show
C
has shown
D
is showing
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The school board listened quietly as Jack read the demands that his classmates ______ forward.
#101151
A
be putting
B
had put
C
were put
D
have put
This is the second time Nie Haisheng ________ to be the astronaut who took the glorious task.
#104309
A
has been chosen
B
had been chosen
C
was chosen
D
chose
At that time he looked angry because his son______computer games all the afternoon
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A
played
B
was playing
C
has played
D
had been playing
—Jane, have you finished yourpaper? —No, I my sister with her homework all the morning.
#102934
A
help
B
have been helping
C
helped
D
was helping