I really can’t thank you enough， sir. — .
| A．That’s the most I could do | B．I’m glad to have been of help |
| C．No problem | D．With pleasure |
_____ he had not been ill , Tom would have won the race.
| A．Unless | B．As | C．If | D．Until |
Stand closer______ you'll be able to see it better.
| A．or | B．while | C．but | D．and |
The teacher never wears anything other than a suit _____ the season.
| A．whatever | B．wherever | C．whenever | D．however |
______ there is a snowstorm or other bad weather ,the bus always comes on time.
| A．Because | B．if | C．When | D．Unless |
“You can’t have your football back ____ you promise not to kick it at my dog again,” the woman said firmly.
| A．until | B．when | C．since | D．because |