It's more ________ to buy a season ticket if you travel every day.
A、cheapA
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________, John has been to several foreign countries.
________fromtheoccasionallatenightparty,ourneighborsareveryquiet.
Theassociationis________toraisingfundstohelptheblind.
________ with the size of the whole earth, the highest mountains do not seem high at all.
To study a foreign language, __________.
