根据句意选用所给词组的适当形式填空，每个词限用一次。

　　go swimming；take a taxi；come back to；on holiday；have a great time；do some shopping；remember to；buy sb．sth．

1. We'll go to the supermarket and ___________ this Sunday．

2. On Mother's Day I'll ___________ some flowers．

3.  Are you free this Saturday?What about ___________ in the river?

4. Last night they ___________ at the party．

5. Yesterday he ___________ to the hotel．

6. ___________ lock the door after class．

7. We'll do some homework and visit my parents ___________.

8.  He'll ___________ Shanghai tomorrow．