Thethreementriedmanytimestosneakacrosstheborderintotheneighboringcountry_____bythepoliceeachtime.
A、hadbeencapturedC
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If a substance is dissolved in water or heated ， it may （）a gas.
Itisnotuncommonforthere_____problemsofcommunicationbetweentheoldandtheyoung.
Thebeachisinanideal（）todrawtourists.
Hewasluredintoacrimehewouldnot____________havecommitted.
.If you have really been studying English for so long, it’s about time you _____ able to write letters in English.
