﹣﹣﹣_________do your parents come to visit you in the US， Tom？
﹣﹣﹣Once a year．（ ）
| A． |
How often |
B． |
How long |
C． |
How soon |
D． |
How far |
___________the students came from different countries，they got on well in the camp．（ ）
A．WhenB．UnlessC．ThoughD．Until
Tina is pleased with the toy．It is ________ gift she has ever received．（ ）
A．a betterB．the betterC．a bestD．the best
I don't know when the bridge was built_______，but it must be very old．（ ）
A．exactlyB．carefullyC．luckilyD．easily
Ann grows up in a _______family．So she always feel happy when she gets home．（ ）
A．richB．strictC．lovingD．serious
Whose dictionary is this？
Oh，it's Peter's．He was looking _______it everywhere．（ ）
A．atB．forC．likeD．after