Read the text and choose the correct answer

I went to Singapore on my own for a ten-day summer course. There were about 15 students from China, Malaysia, Cambodia, India, and Iran in the course. (1) _____. On the second day of the course, we had special team-building activities. We worked in groups of five from different countries (2)_______ The time we spent doing the activity together was really memorable. We discussed how to find the place. After four hours of walking, taking the bus and metro as well as getting lost, we arrived at the destination. Over the remaining days, we attended English lessons. We worked on projects and culture workshops. We discussed and shared our own traditions and customs. During the time here, we also visited the Botanic Gardens, took photos in the orchard garden and explored Chinatown (3)_____  At the weekend, we went to the Discovery Centre. We were impressed by the attraction and interactive gallery as well as the brilliant learning experiences we had. (4)_____ for being able to go without my parents and leaving my comfort zone.
A. to search for a location on a map that the school staff gave us
B. where we bought souvenirs for our parents and friends
C. We were all so surprised about the cleanliness and discipline of the country
D. After the trip, I felt proud of myself
Question 1. ________     Question 2. ________     Question 3. ________     Question 4. ________