一、用括号内所给词的适当形式填空
1．(2015·江西师大附中期中)A teacher of English and class teacher________(tell) us something about volunteer workers now.
2．(2015·山东威海期中)When and where this took place________(be) still unknown.
3．(2015·长沙二模)Every means________(try)，but none proved successful.
4．(2015·江苏苏锡常镇四市调研一)Weibo as well as WeChat________(serve) as a media platform for people to share their thoughts instantly without limits of place or time.
5．(2015·河南开封第一次摸底)—Hey！Here is a message on my cellphone，telling me that I have won the first prize of a weekend for two in Paris.
—Delete it！It's a trick.Many a person________(cheat) by such tricks.
6．(2015·太原测评)One survey shows that large quantities of water________(be)wasted every year in China，and that one third is available to be saved.
