(    ) 1. ----You should keep studying hard at your lessons _____ you have passed this exam.

A. but                            B. even though              C. while                 D. so

(    ) 2. I think __________ French movies is quite ___________.

A. watch, frustrating                                     B. to watch, frustrated

C. watching, frustrated                                D. watching, frustrating

(    ) 3. Are you still afraid __________?

A. to being alone                                           B. of being alone

C. of alone                                                   D. to live lonely

(    ) 4. He has trouble_____________ his ___________ skills.

A. improving, speaking                                         B. to improve, speaking

C. improving, spoken                                    D. to improve, spoken