_______ I’m not sure of winning the match, I will have a try anyway.
| A．While | B．Before | C．Once | D．Since |
I don’t know who invented ________ telephone. It’s really ________ most useful invention.
| A．the; a | B．/; a | C．a; the | D．/; the |
----Whose advice do you think I should take?
----________.
| A．It doesn’t matter | B．That’s it | C．It’s up to you | D．Either is OK |
Could you show me the TV set you’d like ________?
| A．to have repaired | B．repairing it | C．to have it repaired | D．to repair it |
When somewhat better ________ academically, he returned home to continue his research.
| A．equipped | B．had equipped |
| C．provided | D．providing |
This new teaching approach is specially ______ to develop children’s problem-solving skills.
| A．designed | B．devoted | C．concentrated | D．hoped |