He requested that all the soldiers _____ the news secret.
| A．keep | B．kept | C．keeping | D．to keep |
______, I can spare no time for it now. I’ll have to finish my homework first.
| A．However exciting the football is | B．No matter exciting the football is |
| C．However the football is exciting | D．No matter how the football is exciting |
Can you explain ______ that the medicine has for my illness?
| A．about the function to me | B．me about the function |
| C．me the function | D．to me the function |
--- I serve three meals every day and do almost everything for him, but he still lets me down.
--- I’m afraid that’s ______ you are mistaken.
| A．how | B．where | C．what | D．in which |
China’s winning the host of the Olympic was an exciting moment, ______ all Chinese will never forget.
| A．that | B．it | C．one | D．what |
Measures have been taken to prevent accidents, but much ______ for more improvement.
| A．remains to be done | B．is remained to do |
| C．remains to do | D．is remained to be done |