When Tom ______ Beijing, it is raining.

Could you tell me? — Certainly. In 20 minutes.

My brother _____________ some of his free time playing basketball for the school team.

Excuse me，I want to buy some milk．Where can I find a supermarket?—Oh，I know ________ not far from my home．

David, how old is your father this year?—______. And we just had a special party for his _____ birthday last weekend.