How long do you think it will be ________ the computercompany puts forward a new product

Last year, five Chinese teachers to a school in the UK to teach the British students in Chinese style for four weeks.

The consequences of our actions are unbelievably complicated and diverse _______ predicting the future is a very difficult business indeed.

roject as planned, we’ll have to work two morehours a day

Miss Li was_____ that she left her keys in her room.