With the development of science and technology，there is no doubt ________ Chinese astronauts will land on the moon in the near future. 

Only _____ as an interpreter _____ how important it was to practise speaking English.

As your spoken English gets better, ______ your written English．

He__________ he would be able to leave tomorrow, but it's beginning to took difficult.

You look frozen. Sit down by the fire and I ________ you some hot tea.