Seldom _________ his wife punishes her children for speaking out their own ideas freely.

It is imperative that the students ________ writing their papers

The work they are doing is _____ great value.

They will not start the project until the board chairman _______ back from South Africa.

The output of our factory is now twice ________ it was three years ago.

Once more I have to leave Beijing, __________ I have been living for eight years.

At the beginning he refused to take any responsibility but he had to end up by _______ .

This will improve their working conditions and enable them to double the ________ .

They ________ the work in spite of the extremely difficult conditions.

Young _______ he is,he has proved to be an able salesman.

The first question we now discuss is ________ we should go there so early tomorrow.