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1. As I don′t have a credit card, I found it difficult to book an airline ticket over the phone.
Not having . 

2. Calling Jim is pointless, because his phone is out of order.
It′s no use . 

3. Known mainly as a writer of novel, James has now written a successful biography.
Although James . 

4. If you work for this company, you have to travel a lot.
Working for this company involves . 

5. Martin has to wear his glasses to read the newspaper.
Martin can′t .