My mother was ______ tired _____ he went to bed without supper tonight.

It’s difficult to live in a foreign country, if you can’t speak foreign languages.

I’m feeling much better now, so you call the doctor.

It was Mr Zhang that helped us out of the trouble. Without his help, we ______ it so easily.

How about the book you are reading?— Good indeed. It _______many problems we havecome across in our study.[ ]