Some researchers believe that there is no doubt a cure for AIDS will be found. [ ]

The woman hasn’t heard from her son formonths. It______her a lot.

It’s reported that the Chinese government providesfree milk powder (奶粉)children in poor areas.

It’s so cold! Why not close the door? —Sorry.It .I’ll have it repaired soon.

Where does your mother work—she’sworking abroad.