How the big forest fire has remains to be a mystery.
| A．turned up | B．broken out | C．taken place | D．broken up |
Well, you can buy $20 tickets or 30 $ tickets, ______ you prefer．
| A．which | B．whichever | C．whatever | D．what |
_____ sports teams, group work can only be successful when group members respect, help and support each other．
| A．As for | B．As to | C．As with | D．As of |
________________late, he also forgot his books．
| A．Not only the boy turned up | B．Not only the boy turned out |
| C．Not only did the boy show out | D．Not only did the boy show up |
I’m told that languagepractising．com is a free website ______learners can not just learn
various languages but also chat online．
| A．where | B．which | C．that | D．what |
We agreed to accept ______ they thought was the best tourist guide．
| A．whatever | B．anyone | C．whichever | D．whoever |