【C8】A．highB．fixedC．safeD．balanced

[A] variation [B] balance [C] frequency [D] stability

A．quicklyB．cleverlyC．virtuallyD．safely

The helicopter could not land because ______.A．the mountain was too highB．the mountain－sid

【C20】A．dropB．riseC．balanceD．compromise

【C5】A．instantlyB．rapidlyC．fearlesslyD．safely

In university I learned:Live a balanced life.A.Ri