________a US visitor visa twice , the young man finally gave up his hope of
going to America to Christmas Day.
| A．Having been refused | B．Being refused |
| C．Having refused | D．To be refused |
As a famous public figure, you have a duty to _______ yourself, especially in public places.
| A．focus | B．behave | C．guide | D．Operate |
It worried her a bit _________ her hair was turning grey.
| A．while | B．that | C．if | D．For |
Nuclear ______ be really dangerous at times even though it’s a nice energy in general.
| A．shall | B．should | C．can | D．Must |
Students who graduate with experience will be given ________ over those who never work in any company.
| A．prediction | B．preference |
| C．presence | D．Preparation |
As a student of Senior Three, he has very little free time _________ he can spend developing his own interest.
| A．when | B．in which |
| C．at which | D．that |