Afghans used to hold big weddings, costing thousands of dollars, in a county _____ the average annual income is less than $400.
________ blood if you can and many lives will be saved.
_______ the morning of my mother’s birthday, I usually help my mother do some housework.
You ‘d better not phone the manager between 7 and 8 tomorrow evening; he _____ an important meeting then.
---Where will you start your work after graduation?---Mmm, it’s not been decided yet. I ______ continue my study for a higher degree.
---Mum, have you seen my mobile phone?---_______ you bought last week? I’m afraid I haven’t seen _______.