_________to see us, the professor gave us a warmwelcome.

So far we have done a lot to build a lowcarbon economy, but it is _____idealWe have to work still harder.[ ]

The questionnaire won’t take long, ___________ five to ten minutes

Do you know _______ the number of students in our school ______

_____ was most important to her, she told me, was her family. [ ]