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 You are too tired, please stop _______.
#49070
A
to work
B
work
C
working
D
worked
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China spends about seven years ________ ready for the 2008 Olympic Games.
#50789
A
to get
B
getting
C
get
D
geting
 ---Have you heard of Earth Day? --- Yes, We have only one Earth. We have no choice but ________ it.
#49067
A
protect
B
protected
C
protecting
D
to protect
 It is time     to school.
#49964
A
go
B
to go
C
going
D
goes
I’m surprised _______ my old friends in the street.
#48831
A
see
B
seeing
C
to see
D
to look at
I had a little trouble              English  grammar.
#51103
A
learn
B
learned
C
learning
D
to learn