She spent a whole afternoon _____ out her stamps that she had collected. [ ]

______ he comes back, I’ll tell him about it.

dn’t come to the party last Sunday. _______, shemust have made the party more exciting.

As people’s life is getting better and better, so how to ________ is becoming more and more important.

_______ is known to us all is that China is a developing country ______ the Third World.