Mum is coming. What present _______ for your birthday?

I arrived home at midnight, _______ my parents had been waiting for nearly three hours.

Chairman Xi Jinping had _______ friendly talk with US President Obama in ______ America last month.

Which of the two English dictionaries will you buy?——I’ll buy ________ of them, so I can give one to my friend Helen.

The clock ______ last week has gone wrong.