单选题 Physically, boys tend to have an advantage ______ girls.

单选题 Wang Ping had to pay his way ______ school because he came from a poor family.

单选题 We must ______ a positive attitude toward life if we want to live happily.

单选题 It took my family three years to pay ______ our debts.

单选题 Peter ______ start working when it began to rain.

单选题 It's no secret ______ John will win the position.

单选题 The grateful girl thanked her teacher from the ______ of her heart.

单选题 His new tie ______ my attention when he came in.