Despite the rise in importance of major regional languages such as Chinese, Arabic or Spanish, to ever think that the development of English can now be stopped seems totally unrealistic.
The problem of global warming is serious. ______, the sea levels have risen a little.
At the beginning of class, the noise of desks ______ could be heard outside the classroom.
Yesterday morning he got up earlier than ______, for it was not a(n) ______ day.
The medical reform in that country turns out to be ______ failure, but as we know, success often comes after ______ failure.
Having a trip abroad is certainly good for the old couple, but it remains ______ whether they will enjoy it.