Mr.Barrette doesn’t think that all bad language should be allowed.In his opinion，there are ______ that should be kept up.
| A．degrees |
| B．levels |
| C．limits |
| D．standards |
_______ puzzles me most is that I don’t know _______ the difference between those two lies.
| A．What; that | B．It; that | C．What; where | D．It; where |
In our classroom, the pupils work in groups, _______ helps them to learn to co-operate, to share and to develop leadership skill.
| A．which | B．that | C．who | D．what |
We agreed to accept _______ they thought was the best professor in the college.
| A．whatever | B．whomever | C．whichever | D．whoever |
I think Father would like to know _______ I’ve been up to so far, so I decide to send him a quick note.
| A．which | B．why | C．what | D．how |
Here are all the books I have.You may borrow _______ you like.
| A．that | B．which | C．however | D．whichever |