The problem of global warming is serious. _____ , the sea levels have _____a little.[ ]

Don’t be nervous whenever you have a test. — ____________.

When will the new bridge be completed— It is said that it _______ by the end ofthis year.

－It’sdifficult for me to pass the English exams．－So doI．But we shouldn’t hope．

How about the book you are reading—Good indeed. It many problems we have come across in our study.