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INTERMEDIATE LEVEL
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OXF3000N 
đang sử dụng đầy (người) 
occupied
→ → →
like: đang sử dụng → →
It's very different to what I'm used to. ☊ different ☊
Is this an empty chair (= a chair that nobody else is using)? ☊ empty ☊
Increasing numbers of people are using hand-held devices to access the Internet. ☊ increase ☊
Employers are using immigrants as cheap labour. ☊ labour ☊
More and more people are using the Internet. ☊ more and more ☊