It worried her a bit _________ her hair was turning grey.
| A．while | B．that | C．if | D．for |
-- I just can't stop worrying about the result of the job interview.
--. There's nothing you can do now but wait.
| A． | Relax | B． | Go ahead | C． | Go for it | D． | Good luck |
My brother is really. He often works in his office far into the night.
| A． | open-minded | B． | hard-working | C． | self-confident | D． | warm-hearted |
We'll have a picnic in the park this Sundayit rains or it's very cold.
| A． | since | B． | if | C． | unless | D． | until |
Remember that customers don’t＿＿about prices in that city．
| A．debate | B．consult | C．dispute | D．bargain |
John Dewey believed that education should be a preparation for life，that a person learns by doing，and that teaching must＿＿the curiosity and creativity of children．
| A．seek | B．stimulate | C．shape | D．secure |