--- I’m sorry I can’t go to your party tonight.
--- _____ ? Haven’t we agreed on it?
| A．What is it | B．Why don’t you | C．What do you think | D．How is it |
Monkeys in the zoo started to show the flu _______ since last Monday and altogether 20 have died.
| A．symbols | B．signs |
| C．signals | D．symptoms |
---What’s your comment on the match?
--- We ________, but today was not our day.
| A．need have scored | B．could have scored |
| C．should score | D．would score |
---I wonder what makes you a good salesperson
---I _______ as a waiter for three years , which helps my today’s work a lot.
| A．serve | B．have served |
| C．served | D．had served |
The textbooks ________ for teaching English as a foreign language came out in the 16th century.
| A．having written | B．to be written |
| C．being written | D．Written |
If the wound _______ become swollen, do not hesitate to call me.
| A．shall | B．must | C．should | D．Would |