ⅰ.单项填空
1. in recent years，ecotourism has become a widelyaccepted industry that ________ to value harmony between mankind and nature.
a．claims b．adopts
c．adjusts d．inspires
2. with so much work to be done, ______ trip to
a. a; the b. a; /
c. the; / d. the; the
3. — it's the first time that mary ______ the sea.
— is that the reason why she looks so excited?
a. has seen b. is seeing
c. sees d. saw
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