1 . By last Sunday, Heilongjiang had reported 145 confirmed cases since Jan 10, _____ the first asymptomatic(无症状的) carrier of the current outbreak was reported.

A．when

B．which

C．as

D．who

2 . Students should take an active part in community activities _____ they can gain experience for their future development.

A．when

B．which

C．where

D．whose

3 . 假定英语课上老师要求同桌之间交换修改作文,   请你修改你同桌写的以下作文。文中共有10处语言错误, 每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加: 在缺词处加一个漏字符号(∧), 并在其下面写出该加的词。
删除: 把多余的词用斜线( \ )划掉。
修改: 在错词下划一横线, 并在该词下面写出修改后的词。
注意: 1. 每处错误及其修改均仅限一词；2. 只允许修改10处, 多者(从第11处起)不计分。

During the Spring Festival, I watch a sci-fi movie The Wandering Earth with my friends. The movie direct by Guo Fan is very popular in China. It is set in 2075, where the earth is no longer safe to live. Unlike most western movies, the heroes do not give up the earth. Instead, they choose to save the earth by send it to another so-like system. I was deep impressed by the three generation of a Chinese family. They devote them to the mission. The movie conveys lots of Chinese values, but I think it is quite worth seeing it.

4 . We will put off the picnic in the park until next week, ________ the weather may be better.

A．that	B．where
C．which	D．when

5 . It was an exciting moment for these football fans this year,________for the first time in years their team won the World Cup.

A．that	B．while
C．which	D．when