You should ________ your son. He works harder than before.—Thanks, I will.

_________has your English teacher worked here—Since 15 years ago.

________of us live on rice. –Yes, you are right. Welive on rice________.

The computer system proved to be powerful some shortcomings

so sorry to have come late for themeeting.— It is not your fault. With __ rush-hourtraffic and __ heavy rain, it is no wonder you were late.