13.　 He got well-prepared for the job interview , for he couldn’t risk ____ the good opportunity.

A. to lose　 　　　B. losing 　　　　　C. to be lost 　　　　　D. being lost

12.　 When asked by the police , he said that he remembered ____ at the party, but not _____.

A. to arrive, leaving　 B. to arrive , to leave　 C. arriving , leaving　 D. arriving , to leave

11.　 The pilot asked all the passengers on board to remain ____ as the plane was making a landing.

A. seat　 　　　B. seating　 　　　　C. seated　 　　D. to be seating

10.　 He looked around and caught a man ____ his hand into the pocket of a passenger.

A. put　 　　　B. to be putting　 　　　C. to put　 　　D. putting

9.　　　 The flowers ____ sweet in the botanic garden attract the visitors to the beauty of nature.

A. to smell　 　　　B. smelling　 　C. smelt　 　　　D. to be smelt

8.　　　 I don’t know whether you happen ____, but I’m going to study in the USA this September.

A. to be heard 　　B. to be hearing 　　C. to hear 　　D. to have heard

7.　　　 Having been ill in bed for nearly a month, he had a hard time ____ the exam.

A. pass　 　　　B. to pass 　　　　　C. passed　 　　　　D. passing

6.　　　 I really can’t understand ____ her like that.

A. you treat 　　　B. you to treat 　　　C. why treat　 　　　D. you treating

5.　　　 After he became conscious , he remembered ____ and _____ on the head with a rod.

A. to attack , hit　 　　　　　　　B. to be attacked , to be hit　

　 C. attacking , be hit　 　　　　　　D. having been attacked , hit

4.　　　 I can’t stand ___ with Jane in the same office. She just refuses _____ talking while she works.

A. working , stopping　 B. to work , stopping　 C. working , to stop　 D. to work , to stop