______are good friends.
A:I and Jack
B:Jack and I
C:Jack and me
D:Me and Jack
-- That T-shirt with Yao Ming's picture on it ____ belong to David. He admires him a lot.
-- No, it _____ be his. He hates black color.
不等式: −1<3x+45≤2 的非正整数解个数有____个.
______a hot summer day, people don't like to go out.