The traveler _____ his map to make sure he was not lost．（ ）
A．looked afterB．looked up
C．looked forD．looked down
Oh! What's wrong with your finger？
I hurt it while I ___________ a model plane．（ ）
A．. madeB．was makingC．am makingD．make
Which of the following words can NOT be added the prefix "un_______" to give it the opposite meaning？（ ）
A．happyB．healthyC．usualD．polite
A black young man named Sheku Kanneh﹣Mason is _________ enough to show that people of colour can take on any challenge of classical music．（ ）
A．modestB．humorousC．confidentD．curious
Because of the flood， there are _________ tourists in that ancient town this year than last year．（ ）
A．moreB．mostC．fewerD．fewest
Yao Ming， a basketball giant ， ___________ water polo when he was young．（ ）
A．is playingB．used to play
C．is used to playingD．was playing