John promised his doctor he _____ not smoke and he has never smoked ever since.
| A．might | B．should | C．could | D．would |
The monument was built in honor of the explorer who was believed _____ the river.
| A．to discover | B．to have been discovered |
| C．to have discovered | D．having been discovered |
________ blood if you can and many lives will be saved.
| A．Given | B．Give | C．Giving | D．To give |
_______ the morning of my mother’s birthday, I usually help my mother do some housework.
| A．On | B．In | C．During | D．At |
You ‘d better not phone the manager between 7 and 8 tomorrow evening; he _____ an important meeting then.
| A．will have | B．would have | C．will be having | D．will have had |
---Where will you start your work after graduation?
---Mmm, it’s not been decided yet. I ______ continue my study for a higher degree.
| A．need | B．must | C．would | D．might |