He ________ without saying goodbye to them, for he always has good manners.
| A．can’t have left | B．may not have left |
| C．shouldn’t have left | D．mustn’t have left |
---How about camping this weekend, just for a change?
---OK, ____you want.
| A．whichever | B．however | C．whatever | D．whoever |
.It is widely accepted that young babies learn to do things because certain acts lead to ______.
rewards B.prizes C.awards D.results
Li Ming won the first prize in the speech contest and I’m glad that his efforts at last _____.
paid off B. worked out C. got back D. turned out
You had better take something to read when you go to see the doctor____ you have to wait.
| A．even if | B．as if | C．in order that | D．in case |
You should follow _____ of the medicine, and take three pills every day.
| A．direction | B．explanations | C．instructions | D．methods |