问题

When shall we go planting trees in the hill?—______ it begins to rain, so they don’t need watering.

A:Not until
B:While
C:Till
D:Unless

正确答案是：

同类题型

Why does he look so tired these days— He has to work hard_______ the coming test.

Our teacher always tells us that lessons can be learned to face the future, ____ history can’t be changed.

The elderly _________ good care of in public places like supermarkets and airports; they are likely to get lost

work hard with a strong will, we_____ overcome any difficulty, however great it is

You and I could hardly work together，________？[ ]