Studies show that people are more _____ to suffer from back problems if they always sit before computer screens for long hours.
| A．likely | B．possible | C．probable | D．sure |
As the day was fine ，I made the suggestion _______ for a walk in the park .
| A．we go | B．we will go | C．should we go | D．that we go |
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 |