It’s eleven p.m.. Mary is still working _____ the light. [ ]

If ________, please pay a visit to me and have a further discussion of the issue.

Kate wants to know if youa picnic next Sunday.–Yes. But if it, we’ll visit the museum instead.

How can I go to the supermarket, Paul?—_____ bike.It’s not far from here. [ ]

How long have you _________China?—About two years.