This weekend we’re going to Beijing to attend a summer camp and we’ll visit the Bird Nest_______we get there.
单项选择(每题1分) We must think twice _____ we make the final decision.
单项选择(每题1分) The stones each _____ as much as two tons.
单项选择(每题1分) Is this the reason _____ she explained in the report for her success in the job?
单项选择(每题1分) —Look, John’s fallen asleep at work! —Oh, he must have _____ late last night.
单项选择(每题1分) In his letter was his promise _____ he would spend the Christmas Eve with me.