No. 1 David has been a member of a special research group in our laboratory ------- over fifteen years. (A) since (B) for (C) in (D) from No. 2 A customer at Brooks Books is reminded to keep his or her receipt ------- a proof of purchase. (A) off (B) except (C) as (D) on No. 3 A special team was sent to ------- a pitch for the new artificial-intelligence robot. (A) own (B) make (C) throw (D) touch No. 4 The package arrived the day before -------, which was much earlier than Mary expected. (A) yesterday (B) today (C) tomorrow (D) now No. 5 Mr. Omaha evaluates a company over the long ------- before he decides to buy its stock. (A) curve (B) term (C) hour (D) profit No. 6 A doctor told Carmen to take a leave of ------- because she was under too much stress at work. (A) absence (B) incense (C) offense (D) pretense No. 7 Mr. Higgins is very popular among the hotel staff because he often gives a ------- large tip. (A) commercially (B) partially (C) considerably (D) possibly No. 8 The parliamentary candidate is always featured in the media for his ------- statements. (A) bold (B) light (C) small (D) dense No. 9 High school students gathered together to think more ------- about sustainable development. (A) broad (B) broaden (C) broadly (D) abroad No. 10 Everyone is advised to double-check orders to ensure that merchandises will be sent ------- correct addresses. (A) until (B) upon (C) to (D) among