Great changes ___ in our city since 1977.
| A．take place | B．have taken place | C．took place | D．are taken place |
The twins,______at birth,do not know each other .
| A．separated | B．being separated | C．having separated | D．having been separated |
______to looking after her sick father for 2 years ,she badly needed a holiday.
| A．Devoting | B．Having devoting | C．Having been devoted | D．Devoting herself |
----Would you please give me a hand and take the bookcase upstairs?
---_______.
| A．With pleasure | B．My pleasure | C．That’s all right | D．Don’t hurry |
Until he told me yesterday,I knew______of what had happened to him .
| A．everything | B．something | C．anything | D．nothing |
It will be quite a long time ______she is back again,so don’t be too cross with her.
| A．that | B．since | C．before | D．until |