Instructions: Each sentence below is missing a C1 word. Choose the best option from the four choices. Pay attention to context — more than one word might seem right, but only one fits perfectly. 💡
Question 01 · Talking & Saying
The professor asked the student to ___________ on her hypothesis before drawing any conclusions.
💡 Hint: replace "talk more about"
✅ Correct! "Elaborate on" means to give more detail about something — a perfect C1 choice in academic contexts.
Question 02 · Thinking & Believing
Despite criticism from colleagues, the researcher ___________ that her findings were valid.
💡 Hint: replace "continued to believe"
✅ Correct! "Maintained" suggests holding a position firmly despite opposition — more precise than "believed" in academic writing.
Question 03 · Change & Progress
Without regular practice, language skills tend to ___________ quickly.
💡 Hint: replace "get worse"
✅ Correct! "Deteriorate" is a single, precise C1 verb — much stronger than the two-word phrase "get worse" in formal writing.
Question 04 · Problems & Qualities
Excessive screen time has been shown to have ___________ effects on children's concentration.
💡 Hint: replace "bad"
✅ Correct! "Detrimental" collocates naturally with "effects" and signals a formal, academic register.
Question 05 · Writing Essentials
The results of this study ___________ a clear link between sleep and academic performance.
💡 Hint: replace "show"
✅ Correct! "Demonstrate" is the standard academic verb for presenting evidence — essential vocabulary for Bac essay writing.
Question 06 · Change & Progress
A new teaching approach was adopted to ___________ collaboration between students.
💡 Hint: replace "help / make easier"
✅ Correct! "Facilitate" means to make a process easier to happen — extremely common in academic and professional English.
👩🏫 Teacher Usage Tip
Assign this exercise as a timed warm-up (8 minutes). After completion, ask students to write two original sentences using the words they got wrong. This forced production consolidates retention far more effectively than re-reading alone. Works well as a Bac writing preparation activity for B2–C1 groups.
Instructions: Click a B1/B2 word on the left, then click its C1 upgrade on the right. Match all 8 pairs to complete the exercise. 🔗
B1 / B2 Words
think
ask
understand
increase
use
argue
need
change
C1 Upgrades
employ
grasp
necessitate
contend
contemplate
transform
escalate
inquire
8/8
Pairs matched correctly
Outstanding! You matched all 8 pairs correctly. Your C1 vocabulary is developing brilliantly.
👩🏫 Teacher Usage Tip
Use this matching game as a revision activity at the end of a vocabulary lesson or as a homework consolidation task. For stronger groups (B2–C1), add a follow-up challenge: ask students to write a sentence using each C1 word that correctly reflects its register — not just its meaning.