Question 11: You'd better            a commitment to being a volunteer on a regular basis.A. promise                  B. do                             C. make                                  D. pullQuestion 12: I            up a friendship with John while we were on a business trip together.A. struck                     B. drove                        C. strike                                  D. tookQuestion 13: Jet lag causes problems with our            clock.A. biological               B. biology                     C. biologist                             D. biologically128 CÂU TỪ VỰNG TỪ ĐỀ CÔ TRANG ANH TẬP 2