No. 1 The student was ------- to provide the professor with the adequate evidence that the experiment had been successful. (A) uncertain (B) understanding (C) unsure (D) unable No. 2 The shop clerk refused to ------- the customer's 100-dollar bill. (A) changing (B) changed (C) change (D) changes No. 3 Membership to the networking club is open to anyone ------- he or she studied economics or not. (A) whether (B) if (C) either (D) since No. 4 Please let Ms. Potts know when it is ------- for you to meet with her. (A) conventional (B) convertible (C) convenient (D) converged No. 5 The rumor about the company has spread rapidly ------- thousands of employees. (A) among (B) along (C) aside (D) astride 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 If I knew it ----- rain, I would have brought an umbrella. (A) was going to (B) were (C) had (D) will No. 8 The business trip was cancelled because the government ------- travel warnings yesterday for that country. (A) issues (B) issue (C) issued (D) has issued No. 9 The key ------- weight loss success for Rob was to eat more fruits and vegetables and drink green tea. (A) as (B) in (C) for (D) to No. 10 Most of the students who ------- a degree in computer science in this college want to work in Silicon Valley. (A) earn (B) earns (C) yield (D) yields