24. —May I go and play with Dick this afternoon, Mum?
—No, you can’t go out _______ your work is being done.
| A．before | B．until | C．as | D．the moment |
The research they had been devoted to ______ to be of great value to the cancer patients.
| A．is proved | B．proves | C．has proved | D．proved |
A week-long raining is coming, _________, the farmers say, will do harm to the growth of plants.
| A．it | B．that | C．what | D．which |
---I don’t like the guest that is coming to visit this evening.
---_________ you feel about him, try to be polite.
| A．How | B．What | C．Whatever | D．However |
______he came to this small town, he began to like it.
| A．For the first time | B．By the first time | C．At the first time | D．The first time |
--- Why are you so late?
--- I was in half the way when it ________to me that I had left my notebook home, so I had to fetch it.
| A．occurred | B．hit | C．happened | D．reminded |