3 . （2022年新高考I卷）The plan will extend protection to a significant number of areas that ________ (be)previously unprotected, bringing many of the existing protected areas for giant pandas under one authority to increase effectiveness and reduce inconsistencies in management. (所给词的适当形式填空)

4 . In the past decades, some number plates _______ extremely valuable, particularly those that spell out words.

A．had become

B．have become

C．has become

D．became

7 . You can learn enough first aid knowledge in a few minutes—________ it’s from reading a book, attending a course or watching videos online.

A．when

B．as

C．whether

D．once

8 . The New Year’s Eve dinner for Chinese people is a very special moment, ______ they share pleasure and food with their family members and friends.

A．where

B．when

C．that

D．during that time