1) They aimed ________________ a rocket to see the stars from space. a) board b) to board c) boarding 2) The heat forced _____________________ a desert quickly to find shade. a) them cross b) them crossing c) them to cross 3) I couldn't help ________________ my seatbelt before the plane took off. a) fastening b) fasten c) to fasten 4) The captain said we could ____________ a voyage to the nearby islands. a) starting b) start c) to start 5) The tour made _______________ across the suspension bridge, which was thrilling. a) us walking b) us to walk c) us walk 6) We attempted ______________ a donkey on the mountain path, but it was tricky. a) riding b) to ride c) ride 7) Our guide taught _______________ a camel during our visit to the desert. a) us to ride b) us ride c) us riding 8) After we finished ______________ a long distance, we stopped to rest. a) to drive b) drive c) driving 9) We should _____________ a flight to reach the city faster. a) take b) to take c) taking 10)  The teacher reminded _____________ dangerous urban neighborhoods while traveling. a) us avoiding b) us avoid c) us to avoid 11) They didn't enjoy _____________ in the rush hour because the traffic was terrible. a) leave b) leaving c) to leave 12) The guide let ____________ on a tour of the ancient ruins. a) us go b) us to go c) us going 13) On our vacation, we remembered _______________ around the beautiful island. a) sailing b) sail c) to sail

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