--- Mr. Green, I think physics is too difficult for me. ---Tom, work hard, _______ you’ll find it not as difficult.
#58226
A
or
B
but
C
so
D
and
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--Hurry up! The bus is coming.--Wait a minute. Don’t cross the street the traffic lights are green.
#56768
A
until
B
after
C
while
D
since
__ we are young, we can still do something to help protect the environment.
#58217
A
If
B
Since
C
Because
D
Though
How time flies! It’s almost three years _______ we met last time.
#57893
A
when
B
before
C
while
D
since