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The old man is too tired _________ go any further.
#50596
A
enough
B
can’t
C
to
D
so
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Would you mind _________ in class?
#50381
A
no talking
B
not talking
C
no talk
D
not talk
We should study the new traffic rules and 1earn how___________ ourselves．
#49689
A
protect
B
to protect
C
protecting
D
protected
I think it’s important ______ healthy.               
#50995
A
keep
B
keeping
C
keeps
D
to keep
—Before he went abroad, he spent as much time as he ____ English.
#50421
A
could learning
B
learned
C
to learn
D
could learn
I have to work hard _____ the test.
#50128
A
pass
B
to pass
C
for pass
D
passing