单选题 Physically, boys tend to have an advantage _____(　　) girls.

单选题 We must __(　　)___a positive attitude toward life if we want to live happily.

单选题 As soon as he came to his office,he___himself into work.

单选题 It took my family three years to pay _____(　　) our debts.

单选题 The grateful girl thanked her teacher from the ____(　　)_ of her heart.

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

单选题 His new tie___ my attention when he came in.

单选题 Peter ____(　　)_ start working when it began to rain.