___ it was already dark, they went on working in the fields.
| A．If | B．Whether | C．But | D．Though |
---Where is my reference book? It was here a moment ago.
---Someone ______ it by mistake.
| A．should have taken | B．must take |
| C．might take | D．must have taken |
Jack recommended me a few foreign movies, but _______ was to my taste.
| A．nothing | B．neither |
| C．some | D．none |
___exceptions, the rule may stand.
| A．Allow for | B．Allowing for |
| C．To allow | D．To allow for |
They moved to England in 2007 and lived in a big house, ________ to the south.
| A．the windows of which opened | B．the windows of it opened |
| C．its windows opened | D．the windows of which opening |
We’ll have a picnic in the Summer Palace this Sunday ________it rains or it’s very cold.
| A．since | B．if | C．until | D．unless |