单项选择题
--Excuse me, when is the next flight from London due to arrive? --（）.
A.An hour before B.In half anhour. C.Until the next one. D.Before another one.
单项选择题 --I'll be away on a business trip. Would you mind looking after my cat? --Not at all（）
单项选择题 — Who is that speaking? — This is Tom（）
单项选择题 Stocks are regarded as a good long-term（）
