单项选择题
--I'll be away on a business trip. Would you mind looking after my cat? --Not at all（）
A.I’d rather not. B.I’d be happy to. C.I’d like it. D.I’ve no time.
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（）
单项选择题 This fire extinguisher is to be used only in case of（）
