No. 1 It was quite shocking that Ms. Wimbledon left our company ------- saying anything last week. (A) on (B) from (C) by (D) without No. 2 The letter ------- that the annual convention in Las Vegas successfully took place. (A) acknowledgement (B) acknowledgeable (C) acknowledge (D) acknowledged 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 The next flight to Houston has been cancelled ------- mechanical difficulties with the aircraft. (A) concerning (B) due to (C) because (D) in so much that No. 5 Suzy already turned in her ------- for the internship and is waiting to hear a reply from the company. (A) applicable (B) apply (C) applicant (D) application No. 6 The janitor worked overtime for three days ------- during the annual conference. (A) over (B) now (C) forward (D) straight No. 7 Some people say Mr. Carlton's company focuses on promoting the ------- of shareholders too much. (A) interesting (B) interests (C) interestingly (D) interested No. 8 It was shocking news that Silverstone Corporation was fined for committing ------- and substantial violations of federal law. (A) serious (B) seriousness (C) seriously (D) serious-minded No. 9 ------- the economy improves, more people become interested in buying stocks. (A) So (B) As (C) But (D) For No. 10 The new staff who joined our team is very friendly and down-to- -------. (A) earth (B) floor (C) ground (D) town