No. 1 Joe was unable to ------- the problem by himself. (A) solving (B) solved (C) solve (D) solves No. 2 High school students gathered together to think more ------- about sustainable development. (A) broad (B) broaden (C) broadly (D) abroad No. 3 It's getting popular among university students to do volunteer ------- abroad over the summer break. (A) works (B) working (C) worker (D) work No. 4 The governor has concerns ------- with the rapid aging of the local society. (A) associates (B) associated (C) associate (D) associating No. 5 Payment at the store can be made by cash or check, ------- a credit card cannot be accepted. (A) both (B) but (C) or (D) either No. 6 The English conversation club has become active since it brought some new members ------- board. (A) on (B) over (C) for (D) across No. 7 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. 8 A group of prominent scientists met with the President to discuss the ------- of the environment in Alaska. (A) interior (B) style (C) form (D) state No. 9 The government ------- to cut the deficit in half over the next few years. (A) can (B) should (C) will (D) would like No. 10 More and more people tend to choose to travel to Indianapolis by train ------- airplane because it’s cheaper. (A) but (B) without (C) except for (D) instead of