.To improve your health, you can _________ 25— 30 minutes three or four times a week to do simple things such as walking ,cycling or running .
In the north of our town________, which dates back to the Ming Dynasty.
The laptop computer was here a moment ago, but I can’t put my hands ___it now.
I really like this song as it is often heard _________everywhere in China.
_______, the disease will produce a kind of poison that will kill the patient.
—How long are you staying? --I don’t know. _____ A. That’s OK. B Never mind. C. It all depends. D. It doesn’t matter.