MoststormsoccurbetweenAugustandOctober,andearlySeptemberistheriskiestperiodfor______storms.

Most storms occur between August and October, and early September is the riskiest period for ______ storms.

We cannot _____ the country ’ s telecommunications to unqualified people。

Although each TV series will be rated on the basis of its usual content, the ratings can _____ from week to week

His _____ and unwillingness to learn from others prevent him from being an effective member of the team