__________ H7N9 is a deadly virus, it is still safe to eat thoroughly-cooked chicken.
| A．Until | B．While |
| C．If | D．Since |
---Do you like your school life?
---It’s hard to say. If there were no ________ examinations, I should have _______ much happier time at school.
| A．an; a | B．/;a | C．a; the | D．/; / |
It was quite a few years __________the accused was declared innocent and set free.
| A．since | B．that | C．when | D．before |
If it isn’t him, who________ it be?
| A．need | B．can | C．should | D．must |
.---Is your father still in bed?
---No, he __________and ___________for you in the dinning room now.
| A．is already up; waits | B．got up; waiting | C．has got up | D．is already up; waiting |
Do you know Australia was, as a matter of fact,________ used to be a nation of prisoners?
| A．what | B． where | C． which | D．that |