Question

【题目】一 How _______ do I need to feed the birds?

一They _______ food every day, or they will be hungry.

A. often; must be given

B. long; must be given

C. soon; must be given

Answer 1

【答案】A

【解析】

试题分析：句意：---我多久需要喂那些鸟一次？---它们必须每天被喂，否则它们会饿的。此题考查特殊疑问词how often多久一次和含有情态动词的被动语态。根据句意，应选A。