They paid fifty percent of _____ they were able to earn to the state．
| A．that | B．which | C．what | D．whom |
The zoo will have to close ________ the local government agrees to give extra money.
| A．until | B．when | C．unless | D．if |
Wait till I turn on my computer, _____ there is his telephone number.
| A．there | B．where | C．which | D．in that |
You have to pass a driving test_____ you can get a license
A before B until C when D since
What impresses me most is ______ he appears in front of others, he wears a sincere and charming smile．
A．which B．that C．where D that whenever
____ difficulties we meet, we can work them out.
| A．Whatever | B．However | C．Wherever | D．Whenever |