These examples concentrate on questions of structure after main verbs. Do you need a clause, a direct object followed by an infinitive, or just an infinitive, or a gerund (-ing). Writing (or rather typing) the answer is good for reinforcing the structures. You are more likely to use the right words when speaking!
Or log in to play for credit.
This activity is tracked by Keith Surridge. If you are in Keith Surridge's class, please log in for credit: