She must be in the classroom, ?
| A．isn’t she | B．mustn’t she | C．can’ t she | D．does she |
He felt _______ to remind the public to protect the environment.
| A．his duty | B．that is his duty | C．it his duty | D．it is his duty |
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 |