当你询问对方想去上海吗时，应该问：( )
A：Are you a teacher?
B：Do you want to go to Shanghai?
C：What's this?
给划线字注音：
____
又何间焉
望其旗靡
小惠未徧
选择括号内恰当的单词或词组填入空白处，使句意完整、正确。 Are you going to____ （join / take part in）the school rowing club?I think the computer is ____（used / useful）.I spent two hours____ （sweep / sweeping）the house yesterday.The house is so expensive that I can't____ （share / afford）it.Even scientists aren't sure ____（if / whether）or not there are UFOs.
