---____ was it _____they discovered the entrance to the underground palace?
--- Totally by chance.
| A．What; that | B．How; that | C．When; how | D．Where; that |
She was looking for her bicycle key _______ she thought she might have put it.
| A．wherever | B．whenever |
| C．at which | D．no matter where |
One feels it hard to fit in with a new culture _______ he has been accustomed to his won culture.
| A．the moment | B．which | C．now that | D．as |
It was _______ he was ill that he didn’t go to school.
| A．since | B．as | C．because | D．though |
_______ he said he wasn’t hungry , he ate the big breakfast.
| A．Even | B．Unless | C．As | D．Although |
Tired _______ he was , he decided not to trouble her.
| A．as | B．although | C．unless | D．even if |