1. The cautious security guard always alerts the mall manager when anyone suspicious is ______ loitering outside the shop.

2. Ben's teacher reminded him to refrain ______ giving comments till the end of the presentation.

3. She rarely goes to the park to cycle, ______?

4. My sister has the habit of helping Mother ______ the dishes after every meal.

5. Mrs. Sim as well as her children ______ at the Senior Citizens' Home every weekend.