Alice, would you mind not playing the guitar I ______ on the phone.– Oh, sorry, mom.

The subjects students study in America are different from those in China.

People in Tianjin are proud of ______ they haveachieved in the past few years.

Sean has formed the habit of jogging ______the tree-lined avenue for two hours every day.

Tom has much difficulty _____ Chinese so he often asksme _____ help