________ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.
A．Even if B．As far as
C．If only D．So long as
It is comforting to see that ________， we are doing our part for the environment.
A．as small may be we B．as we may be small
C．small as may be we D．small as we may be
There is no point advocating banning smoking in public ________ the law is introduced.
A．when B．unless
C．since D．because
You know it's love when all you want is that person to be happy, ________ you're not part of their happiness.
A．even if B．as if
C．if only D．if ever
One split second later your life or someone else's life could be gone ________ you are just glancing at your phone to check a text message.
A．even though B．in that
C．only if D．as if
Mr. Smith doesn't go to his usual club, ________ it is being decorated these days.
A．for B．yet
C．so D．or
