—Tom wants to know if you will have a picnic tomorrow.—Yes. But if it ______, we’ll play chess instead.

____was known to us all that Johnson had broken his promise____he would give each of us a small gift.

If Simon          hard, he          better results in English.

Many factors influence a student in his/her study, ____ I think are out of a teacher’s control.  

Evidence has been found through years of study _____ children’s early sleeping problems are likely to continue when they grow up.