I wonder how he could __________ not handing in his maths exercises yesterday, for his maths teacher is always strict with his students.
It rained heavily,____ the basketball match had to be put off.
Does John know any other foreign language ___French?
You must work hard,____ you will not learn English well.
____production up by 60%, the company has had another excellent year.
The book is not easy.____ it's rather difficult.