A Christmas tree is ______ sign that can only be understood as far as ______ certain cultural understanding is concerned.
| A．the, / | B．a, the | C．a, a | D．the, a |
It was a pity that the great writer died _________ his work unfinished.
| A．for | B．with | C．from | D．of |
The teacher, with 6 girls and 8 boys of her class, _________ visiting a museum
when the earthquake struck.
| A．was | B．were | C．had been | D．would be |
–---You look so tired. Why not have a rest?
-----_________.
| A．Because I can’t afford it | B．Sorry I can’t |
| C．Thanks | D．Maybe I should |
_______ I accept that he is not perfect, I do actually like the person.
| A．While | B．Since | C．Before | D．Unless |
We were swimming in the lake ________ suddenly the storm started.
| A．when | B．while | C．until | D．before |