单项选择题

How many hours do the researchers advise people to spend doing weekly physical exercises

A．one hour.
B．two hours.
C．one and half.
D．two and hal
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单项选择题
New Delhi has accused Pakistan again of
A．supporting Muslim militants fighting New Delhi's rule in Kashmir.
B．expelling India senior diplomats from their posts in Pakistan.
C．keeping up the nuclear rivalry with India military forces.
D．indicating any possible thaw in their diplomatic relations.
单项选择题
In tit-for-tat expulsions, India and Pakistan
A．had to send each other's senior diplomats back home.
B．will send each other's senior diplomats back home.
C．had sent each other's senior diplomats back home.
D．would send each other's senior diplomats back hom
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