The time adverbial last Saturday tells us that this a single event in the past. Used to is used to describe an ongoing action or state in the past, so you must use the past simple here: He went to.
Habitual aspect
The habitual aspect marks an action as repeated or routine — something done regularly, not just once. English has several ways to express it: the present simple for current habits (I walk to work every day), used to + infinitive for past habits no longer true (I used to smoke), and would + infinitive for repeated past actions in a specific time frame (Every summer, we would go to the lake).
Knowing the difference matters because used to and would aren't interchangeable. Would needs a time anchor; used to doesn't. Get the distinction right and your past narratives stop sounding stiff or vague.
C1 | Advanced
C1 is the advanced level in the CEFR framework, sitting between B2 and C2. At C1 you stop translating in your head and start thinking in English — handling specialised articles outside your field, picking up implicit meaning, and writing structured arguments on complex topics.
Grammatically, C1 means natural use of inversion (Rarely have I seen…), mixed and advanced conditionals, subjunctive forms in formal contexts, and cleft sentences for emphasis. Most university programmes for non-native speakers and many professional certifications set C1 as their entry standard.
Difficulty: Hard
The Hard difficulty tag marks questions and challenges aimed at upper-intermediate to advanced learners — typically B2 and above. Expect interacting rules, edge cases, distractors that look right at first glance, and contexts where the surface meaning and the grammatical answer don't match.
Filter by Hard when you're past the basics and want material that genuinely tests your understanding. These questions catch the gaps your textbook didn't — register-sensitive choices, exception cases, mixed conditionals, the difference between would have been and had been.