-----when has the country been open to international trade?-----1978, I suppose.
---Come on, please give me some ideas about the project. --- Sorry.With so much work ______ my mind, I almost break down.
With the good care taken by doctors and nurses, many patients are beginning to _________.
--- I have got a headache. ---No wonder you _________ in front of that computer too long.
Water can absorb and give off a lot of heat without big changes in temperature, thus creating a ______ environment.
--- If you like, I can do some shopping for you. --- That’s a very kind ________.