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Everyone should make a contribution         the environment.
#60222
A
to protect
B
to protecting
C
protects
D
protected
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 In China students        greet the teachers when classes begin.
#60513
A
are suppose to
B
are supposed to
C
suppose
D
supposed to
I need five Yuan to ______ for summer camp.
#60897
A
spend
B
pay
C
cost
D
take
--- ______ he ______ at this school last term? --- Yes, I think so.
#54346
A
Did, study
B
Has , studied
C
Was , study
D
Did , studied
Where ______ the post office?　　 
#61932
A
are
B
is
C
does
D
do
---Why not _______ a party this week? ---That’s a good idea.
#60641
A
to have
B
having
C
have
D
had