Do you sometimes remember _____ something "in a safe place" but find you've forgotten where you put it? (hide)
hiding
How long do you think you'll go on _____ English? (study)
studying
Do you always remember _____ breaks when you're studying hard? (take)
to take
If someone stole your wallet, would you run after them and try _____ it back? (get)
to get
Is there anything you regret not _____ when you were a child? (do)
doing
Is there an event in your country you'll never forget _____, because it was so significant? (witness)
witnessing
Do you ever stay awake at night because you can't stop _____ about a problem? (think)
thinking
Has anyone you knew as a child gone on _____ famous? (become)
to become
You open a letter that says, "I regret _____ you that your application has been refused". What's it referring to? (inform)
to inform
If you were in a hurry and you saw an accident but there were lots of people around, would you stop _____? (help)
to help
Have you ever tried _____ on your hand as a way of reminding yourself to do something? (write)
writing
Have you ever forgotten _____ a ticket for a train journey, then got caught? (buy)
to buy