________ repeatedly, the problem still appeared in the beginners’ homework.
A．Explaining B．Having explained
C．Having been explained D．To be explained
---It is what parents say and do that really matters in children’s character training.
---________.
A．Properly B．Doubtfully C．Simply D．Absolutely
_______ weather it is, we shall set out on time.
A．Whatever B．However C．Whenever D．Whether
---Is Jack still asleep in class?
---I think he _______ be criticized if he goes on with it.
A．need B．shall C．can D．would
Neither my wife nor I myself______ able to persuade my daughter to change her______.
A．is; thought B．am; mind C．are; decision D．am; brain
In the past decades, sea ice ______ in the Arctic as a result of global warming.
A．had melted B．has been melting C．melted D．is melting
