I____________Tom with me if I had known you and he didn’t get along well with each other.

A. Had the letters typed

B. Have the letters typed

C. Have the letters been typed

D. Have been the letters typed

A. they keep the users alert all the time

B. they are indispensable in everyday communications

C. they make them look more stylish

D. they cannot be replaced by regular phones

A. would be

B. was

C. had been

D. were

A. which

B. what

C. when

D. where

A. have lost / left

B. have lost / leave

C. lost / have left

D. were losing / had left

A. applied/ had asked

B. applied/ asked

C. had applied/ asked

D. applied/ have asked