From March 13th, 2013, anyone under the age of 14 ______ go into Disney’s US parks alone.
How long may I ________this book? For about a week.
Who usually ________in your family ?—My mother does .
____seems very hard to reach the top of the mountains.
Captain America(美国队长) is such _______ wonderful science fiction movie that I want to see it _______ second time.