The AIDS rate in some African countries is_________(是……是十倍之多) that in America.

You can put this together very quickly, using only your hands.

The top of this has a surface which prevents things sliding.

A break in an English friendship usually comes when ______.

Most children_________(对……敏感) any sign of rejection or disapproval from their parents or teachers.

Throughcommunicatingwithhispets,______(他从丧失亲人的极度悲痛中解脱出来).