这个系统极易被滥用。

The system is wide ___open ___to ___abuse.

这项发展也容易被滥用，因为某些市场可能会生产假冒产品。

The development is also ___open ___to ___abuse as counterfeit products could be produced in certain markets.

他的提议容易被批评。

His proposal is ___open ___to ___criticism.