16. A. closes   B. horses    C. roses     D. houses
17. A. cooked  B. hoped    C. laughed  D. measured
18. A. fear       B. near       C. hear        D. bear

trả lời : Your body does a lot of work while you're sleeping.

trả lời : Your body does a lot of work while you're sleeping.

CuCl₂ + Ba(OH)₂  Cu(OH)₂ + BaCl₂

Cu(OH)₂  CuO + H₂O

CuO + H₂SO₄  CuSO₄ + H₂O

CuSO₄ + Ba(NO₃)₂   Cu(NO₃)₂ + BaSO₄

I (just / see) ....................anchew and he say ,,,,,,,,,,,,,,,,,already (do)..............about help of the plan.