A manufacturer says the bed collects more than 8 billion biometric data points every night, ___ sent to the company's servers via an app.
Athey are
Bwhich are正確答案
Cthey have been
Dthat have been
答案與詳解
which 引導非限定關係子句,先行詞為 biometric data points,are sent 為被動語態表「被傳送」,結構完整正確。
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