单项选择题
-- We're going to have a picnic tomorrow. Why don' t yo...
单项选择题-- We're going to have a picnic tomorrow. Why don' t you come with us-- ______, but I'm having a friend over.
--My cousin sent me a wonderful gift from Africa.--Oh, ...
单项选择题--My cousin sent me a wonderful gift from Africa.--Oh, is that so______
The 850 British Airways______ flew from Houston to Lond...
单项选择题The 850 British Airways______ flew from Houston to London at its usual time.
