39.When you read the book, you’d better made a mark ____ you have any questions.
| A．at which | B．at where | C．place | D．where |
It rained heavily,____ the basketball match had to be put off.
| A．so that | B．when | C．otherwise | D．therefore |
Does John know any other foreign language ___French?
| A．except | B．but | C．besides | D．beside |
You must work hard,____ you will not learn English well.
| A．if | B．whether | C．otherwise | D．unless |
____production up by 60%, the company has had another excellent year.
| A．As | B．For | C．With | D．Through |
The book is not easy.____ it's rather difficult.
| A．On the one hand | B．On the contrary |
| C．On the other hand | D．On the other contrary |