Xinxin, a 12-year-old student from Beijing, enjoyed his winter vacation with his father in Singapore. During their visit, he even had the chance to        some of Singapore's sights by himself        his father was busy with other things.
Xinxin’s first adventure        in Singapore was at a water park near their hotel. He enjoyed swimming and        into the water by himself, and then returned to the hotel before a time in the evening that was        by his father.
The boy also made a trip to Universal Studios Singapore        a guardian. He had already been to the park with his father two times during the trip. Xinxin volunteered to make his        trip by himself. His father gave him some pocket money to buy lunch, and then Xinxin rode the shuttle from their hotel to the studios. He spent a whole day there and had a        time.
In an interview with Beijing Evening News, Xinxin’s father said that        he was too busy to spend all his time with his son, he decided to give him the opportunity to develop a sense of       . Had Xinxin’s mother been there, she would not have let Xinxin out of her sight, the father commented.

A．study B．explore C．test D．measure

A．while B．until C．before D．unless

A．along B．alive C．alone D．lonely

A．floating B．surfing C．driving D．diving

A．made B．set C．decided D．asked

A．under B．behind C．with D．without

A．first B．second C．third D．fourth

A．terrible B．miserable C．fantastic D．flexible

A．though B．since C．if D．when

A．independence B．daring C．pride D．diligence