单项选择题

Our ______ new machines are much more economical to run, compared to the old ones.

A．effective
B．efficient
C．affective
D．affectionate
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单项选择题
The city is so small that the delights of sightseeing there can be ______ in three days.
A．exerted
B．executed
C．exhausted
D．explored
单项选择题
______ I like France, I don't think French is the most beautiful tongue in the world.
A．Much as
B．If only
C．Only if
D．As much
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