The athletes competed ________ each other for gold medals in the Olympic Games.

Did you forget about my birthday–______ I’ve booked a table for this evening.

You won’t surf the internet before you finish your homework, ______ you? [ ]

We can use QQ to communicate with eachother online. —Good. Will you please show me ?

Mr Wang told us that he would devote all thetime he could spend _______ his oral English before going abroad