It is uncertain ______ the experiment is worth doing .
A．where B．that C．whether D．how
I’d like to work with ____ is honest and easy to get on with.
A．who B．whoever C．whomever D．no matter who
Mary wrote an article on __the team had failed to win the game.
A．why B．where C．what D．which
Do you have any idea ___ is actually going on in the classroom?
A．that B．what C．as D．which
If one of the computers _______, the whole networks would be unable to work.
A．broken down B．broke up C．broke out D．broke in
Poor Richard spent his last penny on a bowl of noodles. Now he is______.
A．as strong as a horse B．as busy as a bee
C．as poor as a church mouse D．as cool as a cucumber
