A small car is big for family of three_______ you need more space for luggage.
A．once B．because C．if D．unless
The reason______ she failed to go to the party puzzled all of the people present.
A．what B．why C．as D．which
In the U.S, ______a tip is thought to be polite when paying the bill.
A．leave B．having left C．leaving D．being left
He is the only one of those clerks ________ to the important conference.
A．who was inviting B．who were invited
C．who has been invited D．who have been invited.
When I turned to Tony for help, I found that the more he tried to explain, ___________.
A．the more I became confused. B．the more confused became I
C．the more confused I became D．I became more confused.
The two boys share the same hobbies but they are quite different _______ personality.
A．in B．with C．for D．on
