_______ on time, this medicine will be quite effective.
| A．Taking | B．Being taken |
| C．Taken | D．Having taken |
The city ______ we visited last year is the one _____the famous writer was born.
| A．where, which | B．which, where | C．in which, that | D．where, where |
—Are they about to have dinner？
—Yes, it ________ in the dinning room.
| A．is serving | B．is served | C．is being served | D．serve |
We were swimming in the lake _____ suddenly the storm started.
| A．when | B．while | C．until | D．before |
---Have you read the timetable ? ---Yes . The train ____ at 10:12 p.m..
| A．will start | B．is going to start | C．should start | D．starts |
Do you know __________ ?
| A．he lives where | B．where he lives |
| C．where does he live | D．where is he living |