C. to                                                                     D. onto

19. He is ______ of an expert on international law.

A. something                                                           B. anything

C. everything                                                           D. nothing

20. China attaches great importance ______ the relationships with her neighbouring countries.

A. onto                                                                  B. in

C. to                                                                              D. into

21. He tried to appear calm, but his trembling voice gave him ______.

A. up                                                                      B. away

C. in                                                                              D. off