--When were the soldiers sent to the earthquake-stricken area? -- _______ the earthquake broke out.

I got to know him five years ago. We have been in close touch with each other ______.

-- Could you help me find some information on the net?--I’m occupied now. _______, I’ll do it later.

There are forty five students in our class, and they are _____ interested in football.

After a long walk, they were _______tired that they could not move even one step further.